History of Colorado in Timeline

Colorado is a Mountain state in the Western United States, known for its diverse landscape including mountains, forests, high plains, mesas, canyons, plateaus, rivers, and deserts. It encompasses much of the Southern Rocky Mountains, parts of the Colorado Plateau, and the western Great Plains. It is the eighth-largest U.S. state by area and the 21st by population, with an estimated population of nearly 6 million as of 2024.

1901: Consecutive Days Above 90°F in Denver

In 1901, Denver's record for the number of consecutive days above 90 °F was set.

1903: Western Federation of Miners Strike

In 1903, poor labor conditions led to clashes between striking miners and the Colorado National Guard during the Western Federation of Miners Strike.

1904: Western Federation of Miners Strike

In 1904, poor labor conditions led to clashes between striking miners and the Colorado National Guard during the Western Federation of Miners Strike.

1905: Holly Sugar first milled

In 1905, Holly Sugar was first milled from beets in Holly, Colorado. The company later moved its headquarters to Colorado Springs.

1906: Oscar Wilde's Impressions of America published

In 1906, Oscar Wilde's Impressions of America was published, in which he described Leadville, Colorado, as "the richest city in the world".

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1908: Democratic Party Convention in Denver

In 1908, Colorado became the first western state to host a major political convention when the Democratic Party met in Denver.

1910: Uranium and Vanadium mining

From 1910 to 1922, Colorado and Utah dominated radium mining, with uranium and vanadium as byproducts of the mining process.

1910: Samsonite luggage origin

In 1910, Samsonite luggage, a brand known nationally, originated in a Colorado factory in Denver.

1911: Gates belts and hoses origin

In 1911, Gates belts and hoses, a brand known nationally, originated in a Colorado factory in Denver.

1913: Colorado Coalfield War

In 1913, the Colorado Coalfield War resulted in federal troops intervening to end the violence.

1914: Colorado Coalfield War

In 1914, the Colorado Coalfield War resulted in federal troops intervening to end the violence.

1920: CoorsTek industrial ceramics origin

In 1920, CoorsTek industrial ceramics, a brand known nationally, originated in a Colorado factory in Golden.

1920: Denver Streetcar Strike

In 1920, the Denver streetcar strike resulted in federal troops intervening to end the violence.

1921: Regis College renamed

In 1921, Sacred Heart College was renamed Regis College.

1923: Russell Stover Candies origin

In 1923, Russell Stover Candies, a brand known nationally, originated in a Colorado factory in Denver.

April 1, 1924: Armed students patrolled campus

On April 1, 1924, armed students patrolled the campus after a burning cross was found, during tensions between Regis College and the Ku Klux Klan.

1924: Ku Klux Klan Dominance in Colorado Politics

In 1924, the Ku Klux Klan Colorado Realm achieved dominance in Colorado politics, controlling both local and state Democrat and Republican parties.

1927: Colorado Coal Strike

In 1927, the 1927-28 Colorado coal strike occurred and was ultimately successful in winning a dollar a day increase in wages.

1930: Colorado Population Exceeds One Million

By the U.S. census in 1930, the population of Colorado first exceeded one million residents.

1930: Monfort of Colorado, Inc. established

In 1930, Monfort of Colorado, Inc. was established, which later evolved into the present-day Swift packed meat of Greeley.

November 8, 1932: Colorado Approves Repeal of Alcohol Prohibition

On November 8, 1932, Colorado approved the repeal of alcohol prohibition, which occurred more than a year before the Twenty-first Amendment to the United States Constitution was ratified.

1935: Agricultural College of Colorado renamed

In 1935, the Agricultural College of Colorado was renamed the Colorado State College of Agriculture and Mechanic Arts.

1940: Colorado Population by Ethnicity

In 1940, the U.S. Census Bureau reported Colorado's population as 8.2% Hispanic and 90.3% non-Hispanic White.

1940: Establishment of Ute Mountain Ute Indian Reservation

In 1940, the Ute Mountain Ute Indian Reservation (Ute dialect: Wʉgama Núuchi) was established in Colorado.

1941: USS Colorado at Pearl Harbor Attack

In 1941, at the time of the attack on Pearl Harbor, the battleship USS Colorado was located at the naval base in San Diego, California, and thus went unscathed.

1945: Last Wild Wolf Shot

In 1945, the last wild wolf in Colorado was shot, following a process of extirpation by trapping and poisoning of the gray wolf from the state in the 1930s.

1947: Introduction of Mountain Goats

Between 1947 and 1972, the mountain goat was introduced to Colorado.

1948: Colorado votes Democratic

In 1948, Colorado voted for the Democratic presidential candidate, marking one of the few times during the post-World War II era when the state did not vote Republican.

1949: Jolly Rancher candy origin

In 1949, Jolly Rancher candy, a brand known nationally, originated in a Colorado factory in Golden.

1953: Ban on Sunday Motor Vehicle Sales

Since at least 1953, Colorado has banned the sale of motor vehicles on Sundays, as per C.R.S. section 12-6-302.

April 1, 1954: President Eisenhower signs law creating U.S. Air Force Academy

On April 1, 1954, President Dwight Eisenhower signed a law that paved the way for the establishment of the U.S. Air Force Academy.

September 11, 1957: Plutonium Fire at Rocky Flats Plant

On September 11, 1957, a plutonium fire occurred at the Rocky Flats Plant, resulting in significant plutonium contamination of surrounding populated areas.

1957: Colorado State College of Agriculture and Mechanic Arts renamed

In 1957, the Colorado State College of Agriculture and Mechanic Arts became Colorado State University.

1958: Last Gubernatorial Electoral Victory For Native Born Coloradan

Bill Ritter's 2006 election marked the first electoral victory for a native-born Coloradan in a gubernatorial race since 1958.

1958: Estes model rockets launched

In 1958, Estes model rockets were first launched in Penrose, Colorado.

1962: Waterpik dental water jets and showerheads origin

Since 1962, Fort Collins has been the home of Waterpik dental water jets and showerheads.

1964: Colorado votes Democratic

In 1964, Colorado voted for the Democratic presidential candidate, marking one of the few times during the post-World War II era when the state did not vote Republican.

1965: Denver Flood

In 1965, the Denver Flood occurred.

1967: Colorado Loosens Abortion Restrictions

In 1967, Colorado was the first state to loosen restrictions on abortion, allowing abortions in cases of rape, incest, or threats to the woman's health.

March 1969: National Chicano Youth Liberation Conference

In March 1969, the National Chicano Youth Liberation Conference was held in Colorado.

1969: Celestial Seasonings herbal teas origin

Since 1969, Celestial Seasonings herbal teas have been made in Boulder, Colorado.

May 12, 1970: Denver chosen to host 1976 Winter Olympics

On May 12, 1970, Denver was selected by the International Olympic Committee to host the 1976 Winter Olympics.

1972: Introduction of Mountain Goats

Between 1947 and 1972, the mountain goat was introduced to Colorado.

1972: Colorado Voters Reject Funding for 1976 Winter Olympics

In 1972, Colorado voters rejected a referendum proposal to fund the 1976 Winter Olympics, which had been scheduled to be held in the state.

1973: Recorded Earthquakes in Colorado

As of June 2020, there were 525 recorded earthquakes in Colorado since 1973, a majority of which range 2 to 3.5 on the Richter scale.

1973: John Arthur Love Position in Richard Nixon's Administration

When John Arthur Love was given a position in Richard Nixon's administration in 1973, John David Vanderhoof ascended from the Lieutenant Governorship.

1975: John David Vanderhoof Leaves Office

In 1975 John David Vanderhoof left office; this marked the last time a native-born governor was in office in Colorado until 2007.

1976: Big Thompson River Flooding

In 1976, the Big Thompson River flooding occurred.

1976: 1976 Winter Olympics

The 1976 Winter Olympics were to be hosted in Colorado, however, the funding was rejected in 1972.

1981: Rocky Mountain Chocolate Factory origin

In 1981, Rocky Mountain Chocolate Factory made its first candy in Durango, Colorado.

1984: Presidential election margin

Prior to 2020, the presidential election of 1984 was the last time that Colorado was won by a double-digit margin.

February 1, 1985: Lowest Recorded Air Temperature in Colorado

On February 1, 1985, the lowest official air temperature ever recorded in Colorado was −61 °F at Maybell.

1988: Rio Grande acquired

In 1988 the "Rio Grande" was acquired, but was merged into, the Southern Pacific Railroad by their joint owner Philip Anschutz.

July 11, 1990: Severe Hailstorm in Denver

On July 11, 1990, a severe hailstorm hit Denver.

1990: Limon F3 Tornado

In 1990, the Limon F3 tornado occurred in the Eastern Plains.

1991: Regis College renamed

In 1991, Regis College was renamed Regis University.

1992: Colorado votes Democratic

In 1992, Colorado voted for the Democratic presidential candidate, marking one of the few times during the post-World War II era when the state did not vote Republican.

1992: Amendment 2 Approved by Colorado Voters

In 1992, Colorado voters approved Amendment 2, which sought to prevent cities, towns, or counties from recognizing homosexuals or bisexuals as a protected class.

1993: Mountain Goats Declared Native

In 1993, despite being an artificially-introduced species, the state declared mountain goats a native species.

September 11, 1996: Anschutz sold company

On September 11, 1996, Philip Anschutz sold the combined Southern Pacific and Rio Grande company to the Union Pacific Railroad, creating the largest railroad network in the United States.

1996: U.S. Supreme Court Ruling on Romer v. Evans

In 1996, the U.S. Supreme Court ruled in Romer v. Evans that preventing protected status based on homosexuality or bisexuality violated the Equal Protection Clause.

1999: Columbine High School Massacre

In 1999, the Columbine High School massacre occurred, where two gunmen killed 12 students and one teacher before committing suicide.

November 7, 2000: Amendment 20 passed

On November 7, 2000, 54% of Colorado voters passed Amendment 20, amending the Colorado State constitution to allow the medical use of marijuana.

2000: Census of Coloradans Native to Other States

According to the 2000 census, nearly 60% of Coloradans are native to other states.

2000: Ancestry Groups in Colorado

According to the 2000 census, the largest ancestry groups in Colorado are German (22%), Mexican (18%), Irish (12%), and English (12%).

2000: Medicinal use legalization of marijuana

In 2000, Colorado legalized marijuana for medicinal use.

2000: Estimated Hispanic Population

Per the 2000 census, the Hispanic population is estimated to be 918,899, or approximately 20% of the state's total population.

2001: Uranium mining revival prompted by price increase

From 2001 to 2007, rising uranium prices prompted several companies to revive uranium mining in Colorado.

2002: Hayman Fire

In 2002, the Hayman Fire occurred.

2003: Senior property tax exemption suspended

In 2003, the senior property tax exemption in Colorado was temporarily suspended by the Colorado Legislature.

2004: Colorado's Obesity Rate

Colorado has the lowest obesity rates in the US, as of 2018, 24% of the population was considered medically obese, which had increased from 17% in 2004.

2005: Real ID Act

Colorado's state-issued digital identifications will be considered valid when Real ID enforcement begins in 2025, in line with the Real ID Act of 2005.

2006: Amendment 43 Bans Same-Sex Marriage

In 2006, Colorado voters passed Amendment 43, which banned same-sex marriage in the state.

2006: Tax break return scheduled

In 2006, the return of Colorado's senior property tax break was scheduled for the assessment year.

2006: Total Births in Colorado

In 2006, there were a total of 70,331 births in Colorado, which was a birth rate of 14.6 per thousand.

2007: Uranium mining revival prompted by price increase

From 2001 to 2007, rising uranium prices prompted several companies to revive uranium mining in Colorado.

2007: Bill Ritter Takes Office

In 2007, Bill Ritter took office as governor; his election the previous year marked the first electoral victory for a native-born Coloradan in a gubernatorial race since 1958.

2007: Births by Ethnicity

In 2007, non-Hispanic Whites were involved in 59.1% of all births. Some 14.06% of those births involved a non-Hispanic White person and someone of a different race.

2007: Tax break payable

In 2007, the tax break was payable.

2008: New Record of Consecutive Days Above 90°F in Denver

During the summer of 2008, the record for consecutive days above 90 °F in Denver was broken, reaching 24 days.

2008: Colorado votes for Barack Obama

In 2008, Colorado voted for Barack Obama, signaling a shift towards the Democratic Party.

2008: Windsor EF3 Tornado

In 2008, the Windsor EF3 tornado devastated the small town of Windsor.

2008: Uranium mining projects cancelled or scaled back

In late 2008, price drops and financing problems forced companies to cancel or scale back uranium-mining projects in Colorado.

2009: Colorado Population Exceeds Five Million

In 2009, the United States Census Bureau estimated that the population of Colorado exceeded five million.

2010: Largest Christian Denominations in Colorado

According to the Association of Religion Data Archives, in 2010 the largest Christian denominations in Colorado were the Catholic Church with 811,630 adherents, multi-denominational Evangelical Protestants with 229,981, and the Church of Jesus Christ of Latter-day Saints with 151,433.

2010: Colorado's Hispanic Population Percentage

As of the 2010 census, Colorado had the seventh highest percentage of Hispanics (20.7%) in the U.S.

2010: Boulder named America's Foodiest Town

In 2010, Boulder, Colorado was named America's Foodiest Town by Bon Appétit.

2010: Fourmile Canyon Fire

In 2010, the Fourmile Canyon Fire occurred.

2010: Per Capita Personal Income

In 2010, the per capita personal income in Colorado was $51,940, ranking the state 11th in the nation.

2010: Denver-Aurora-Centennial MSA Census

The 10-county Denver–Aurora–Centennial, CO Metropolitan Statistical Area increased by +15.29% since the 2010 census.

2010: Denver-Aurora-Greeley CSA population change since 2010

The 12-county Denver–Aurora–Greeley, CO Combined Statistical Area had a population increase of +17.23% since the 2010 census.

2010: Front Range Urban Corridor Population change since 2010

The 18-county Front Range Urban Corridor had a population increase of +16.65% since the 2010 census.

August 22, 2011: Earthquake Near Trinidad

On August 22, 2011, a 5.3 magnitude earthquake occurred 9 miles west-southwest of the city of Trinidad.

2011: Minority Population Under One Year Old

In 2011, 46% of Colorado's population younger than the age of one were minorities, meaning that they had at least one parent who was not non-Hispanic White.

June 2012: Waldo Canyon Fire and High Park Fire

In June 2012, the Waldo Canyon Fire and High Park Fire occurred.

July 20, 2012: Aurora Movie Theater Shooting

On July 20, 2012, a gunman killed 12 people in a movie theater in Aurora.

November 6, 2012: Amendment to protect personal use of marijuana

On November 6, 2012, Colorado voters amended the state constitution to protect the "personal use" of marijuana for adults, establishing a framework to regulate marijuana similarly to alcohol.

2012: Colorado votes for Barack Obama

In 2012, Colorado voted for Barack Obama for the second time, continuing the state's trend toward supporting Democratic candidates.

2012: Amendment protecting marijuana personal use

In 2012, voters amended the state constitution to protect the "personal use" of marijuana for adults, establishing a framework to regulate cannabis like alcohol.

2012: 64th state amendment adoption

With the adoption of the 64th state amendment in 2012, Colorado became the first state in the union to legalize marijuana for medicinal, industrial (hemp), and recreational use.

January 2013: RTD rail system

As of January 2013, the Regional Transportation District (RTD) rail system in the Denver Metropolitan Area had 170 light-rail vehicles, serving 47 miles (76 km) of track.

June 2013: Black Forest Fire

In June 2013, the Black Forest Fire occurred.

2013: Pronghorn Population Rebound

By 2013, conservation efforts succeeded in bringing the stable population of pronghorn back up to roughly 66,000.

2013: Mountain Goat Kids Illness

In 2013, 2014, and 2019, an unknown illness killed nearly all mountain goat kids, leading to a Colorado Parks and Wildlife investigation.

2013: Colorado Floods

In 2013, the Colorado Floods occurred.

January 1, 2014: First Recreational Marijuana Shops Open

On January 1, 2014, the first recreational marijuana shops in Colorado, and by extension the United States, opened their doors.

April 4, 2014: Senate Bill 14–184 introduced

On April 4, 2014, Senate Bill 14–184 addressing oversight of Colorado's industrial hemp program was first introduced.

May 31, 2014: Senate Bill 14–184 signed into law

On May 31, 2014, Senate Bill 14–184 was signed into law by Governor John Hickenlooper, addressing oversight of Colorado's industrial hemp program.

August 2014: Driver licenses to aliens not lawfully in the US

In August 2014, Colorado began issuing driver licenses to aliens not lawfully in the United States who lived in Colorado.

September 2014: Driver licenses issued to non-citizens

In September 2014, KCNC reported that 524 non-citizens were issued Colorado driver licenses that are normally issued to U.S. citizens living in Colorado.

2014: Life Expectancy in Colorado

According to a report in the Journal of the American Medical Association, residents of Colorado had a 2014 life expectancy of 80.21 years, the longest of any U.S. state.

2014: Religious Affiliations in Colorado

As of 2014, major religious affiliations in Colorado were 64% Christian (44% Protestant, 16% Roman Catholic, 3% Mormon, and 1% Eastern Orthodox), 1% Judaism, 1% Muslim, 1% Buddhist, 4% other, and 29% secular.

2014: Mountain Goat Kids Illness

In 2013, 2014, and 2019, an unknown illness killed nearly all mountain goat kids, leading to a Colorado Parks and Wildlife investigation.

2014: Medical Marijuana Program Cash Fund allocation

In the 2014 budget, while governor, John Hickenlooper allocated about half of the state's $13 million "Medical Marijuana Program Cash Fund" to medical research.

2015: Furious 7 filming on Pikes Peak Highway

In 2015, driving sequences for Furious 7 were planned to be filmed on Pikes Peak Highway in Colorado.

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2015: Obergefell v. Hodges Nullifies Amendment 43

In 2015, the U.S. Supreme Court's decision in Obergefell v. Hodges nullified Amendment 43, the ban on same-sex marriage in Colorado.

2015: Total State Product in Colorado

In 2015, the total state product in Colorado was $318.6 billion.

2016: No major uranium mining operations

As of 2016, there were no major uranium mining operations in Colorado, though plans existed to restart production.

2016: Marijuana sales in Colorado

Colorado's marijuana industry sold $1.31 billion worth of marijuana in 2016, generating tax, fee, and license revenue of $194 million.

2016: Colorado votes for Hillary Clinton

In 2016, Colorado voted for Hillary Clinton in the presidential election, further establishing the state's lean towards the Democratic Party.

2016: Median Annual Household Income

In 2016, the median annual household income in Colorado was $70,666, which ranked 8th in the nation.

May 8, 2017: Costliest Hailstorm in Colorado History

On May 8, 2017, a hailstorm hit Denver, becoming the costliest ever in the state's history.

2017: Marijuana sales in Colorado

Colorado's marijuana industry sold $1.26 billion worth of marijuana in the first three-quarters of 2017.

2017: Colorado's Fertility Rate

In 2017, Colorado recorded the second-lowest fertility rate in the United States outside of New England, after Oregon, at 1.63 children per woman.

August 24, 2018: Minor Earthquakes in Colorado

On August 24, 2018, four minor earthquakes rattled Colorado, ranging from magnitude 2.9 to 4.3.

December 2018: Unemployment rate

As of December 2018, Colorado's unemployment rate was 4.2%.

2018: Obesity Rates in Colorado

As of 2018, 24% of the population in Colorado was considered medically obese.

2018: Medical Marijuana Program Cash Fund use

By 2018, the Medical Marijuana Program Cash Fund was the "largest pool of pot money in the state" and was used to fund programs including research into pediatric applications for controlling autism symptoms.

2018: Tourism Statistics in Colorado

In 2018, Colorado attracted 85.2 million tourists, generating $22.3 billion in revenue.

2018: Grand Valley AVA named Top Ten wine travel destination

In 2018, Wine Enthusiast Magazine named Colorado's Grand Valley AVA in Mesa County, Colorado, as one of the Top Ten wine travel destinations in the world.

2018: USS Colorado Commissioned

In 2018, the Virginia-class submarine USS Colorado (SSN-788) was commissioned.

2018: Teachers' strike inspiration

In 2018, the West Virginia teachers' strike inspired teachers in other states, including Colorado, to take similar action.

July 20, 2019: Highest Recorded Air Temperature in Colorado

On July 20, 2019, the highest official ambient air temperature ever recorded in Colorado was 115 °F at John Martin Dam.

October 2019: Colorado accepts digital ID via myColorado app

In October 2019, Colorado became the first state to accept digital ID via its myColorado app.

2019: Colorado Population by Ethnicity

By 2019, Hispanics made up 22% of Colorado's population, and Non-Hispanic Whites made up 70%.

2019: Pronghorn Population Growth and Suburban Encounters

By 2019, the population of pronghorn was estimated to have reached 85,000 and had increasingly more run-ins with the increased suburban housing along the eastern Front Range.

2019: Mountain Goat Kids Illness

In 2013, 2014, and 2019, an unknown illness killed nearly all mountain goat kids, leading to a Colorado Parks and Wildlife investigation.

2019: Vulnerability to Climate Change in Southeastern Colorado

In 2019, The Denver Post reported that individuals living in southeastern Colorado are more vulnerable to potential health effects from climate change than residents in other parts of the state.

2019: Wolf Pack Recolonization

In 2019, a wolf pack recolonized Moffat County, Colorado in northwestern Colorado.

2019: Colorado Employment Statistics

In 2019, the total employment in Colorado was 2,473,192 and the number of employer establishments was 174,258.

April 18, 2020: First Space Force officers commissioned

On April 18, 2020, the Air Force Academy commissioned its first class of Space Force officers.

June 2020: Recorded Earthquakes in Colorado

As of June 2020, there were 525 recorded earthquakes in Colorado since 1973, a majority of which range 2 to 3.5 on the Richter scale.

November 2020: Income tax rate lowered

In November 2020, Colorado voters authorized an initiative to lower the state income tax rate to 4.55 percent.

2020: Colorado Ranked as Seventh Easiest State to Vote In

According to a 2020 study, Colorado was ranked as the seventh easiest state in the United States for citizens to vote in.

2020: Population Distribution in Colorado Municipalities

At the 2020 United States census, 4,299,942 of the 5,773,714 Colorado residents (74.47%) lived in one of the 273 active incorporated municipalities. Another 714,417 residents (12.37%) lived in one of the 210 census-designated places.

2020: Denver-Aurora-Centennial MSA Population

At the 2020 United States census, the Denver–Aurora–Centennial, CO Metropolitan Statistical Area had a population of 2,963,821.

2020: Religious Affiliations in Colorado

In 2020, Christianity represented 66% of the population in Colorado, while the religiously unaffiliated comprised 28%.

2020: Vote to Reintroduce Gray Wolves

In 2020, Coloradans voted to reintroduce gray wolves.

2020: Colorado as a Safe Blue State

In 2020, Colorado solidified its status as a safe blue state in both state and federal elections. In presidential elections, the state had not been won by double digits since 1984.

2020: Colorado votes for Joe Biden

In 2020, Colorado voted for Joe Biden in the presidential election, reinforcing its Democratic lean.

2020: Impact of Arid conditions and drought on Corn yields

In 2020, arid conditions and drought negatively impacted corn yields in the Eastern Plains of Colorado.

2020: Front Range Urban Corridor Population

In 2020, the 18-county Front Range Urban Corridor had a population of 5,055,344.

2020: Largest Christian Denominations in Colorado

In 2020, the Association of Religion Data Archives determined the largest Christian denominations in Colorado were Catholics (873,236), non/multi/inter-denominational Protestants (406,798), and Mormons (150,509).

2020: Pine Gulch Fire, Cameron Peak Fire, and East Troublesome Fire

In 2020, the Pine Gulch Fire, Cameron Peak Fire, and East Troublesome Fire, the three largest fires in Colorado history, occurred.

2020: United States Census

In 2020, the United States Census was conducted.

2020: Colorado Population Estimate

On July 1, 2024, the United States Census Bureau estimated the population of Colorado at 5,957,493, a 3.2% increase since the 2020 United States census.

March 22, 2021: King Soopers Supermarket Shooting in Boulder

On March 22, 2021, a gunman killed 10 people, including a police officer, in a King Soopers supermarket in Boulder.

December 30, 2021: Marshall Fire

On December 30, 2021, the Marshall Fire started, becoming the most destructive fire in Colorado history in terms of property loss.

November 2022: myColorado app reaches 1 million users

By November 2022, the Colorado Governor's Office of Information Technology announced that the myColorado app had over 1 million users.

2022: Homeless Population in Colorado

According to HUD's 2022 Annual Homeless Assessment Report, there were an estimated 10,397 homeless people in Colorado.

2022: Plan to Reintroduce Gray Wolves

By 2022, the state committed to a plan to have a population of gray wolves in the state and permitting non-lethal methods of driving off wolves attacking livestock and pets.

2022: Religious Affiliations in Colorado

In 2022, 61% of Colorado was Christian, 2% New Age, 1% Jewish, 1% Hindu, and 34% religiously unaffiliated.

2022: Colorado Springs Nightclub Shooting

In 2022, a gunman killed 5 people at a nightclub in Colorado Springs during the night of November 19–20 in an instance of anti-LGBT violence.

2022: Impact of Arid conditions and drought on Corn yields

In 2022, arid conditions and drought negatively impacted corn yields in the Eastern Plains of Colorado.

July 21, 2023: Office of Management and Budget Defines Statistical Areas

On July 21, 2023, the Office of Management and Budget defined 21 statistical areas for Colorado comprising four combined statistical areas, seven metropolitan statistical areas, and ten micropolitan statistical areas.

December 19, 2023: Colorado Supreme Court Disqualifies Donald Trump

On December 19, 2023, the Colorado Supreme Court ruled that Donald Trump was disqualified from the 2024 United States presidential election due to his alleged incitement of the January 6 United States Capitol attack.

2023: Democratic Party Majority in Colorado General Assembly

As of 2023, the Democratic Party holds a 23 to 12 majority in the Senate and a 46 to 19 majority in the House of the Colorado General Assembly.

March 4, 2024: U.S. Supreme Court Overrules Colorado Decision

On March 4, 2024, the United States Supreme Court overruled the Colorado Supreme Court's decision to disqualify Donald Trump from the 2024 presidential election.

July 1, 2024: Colorado Population Estimate

On July 1, 2024, the United States Census Bureau estimated Colorado's population to be 5,957,493, which is a 3.2% increase from the 2020 United States census.

2024: Colorado Establishes Right to Abortion and Repeals Marriage Ban

In 2024, Colorado residents voted to establish an explicit right to abortion in the state's constitution and to repeal Amendment 43's defunct marriage ban.

2024: Colorado votes for Kamala Harris

In 2024, Colorado voted for Kamala Harris, continuing its trend of supporting Democratic candidates in presidential elections.

March 27, 2025: Sundance Film Festival move announced

On March 27, 2025, it was announced that the Sundance Film Festival would move to Boulder starting in 2027 after reaching a deal for a ten-year duration.