Milwaukee is the most populous city in Wisconsin and the county seat of Milwaukee County. According to the 2020 census, the city had a population of 577,222, making it the 31st-most populous city in the United States and the fifth-most populous in the Midwest. Milwaukee serves as the central city of its metropolitan area, which is the 40th-most populous in the U.S., with a population of 1.57 million.
By 1900, 34 percent of Milwaukee's population was of German background.
In 1900, East Milwaukee, later known as Shorewood, was incorporated.
In 1902, West Allis was added as a suburb of Milwaukee.
In 1906, West Milwaukee was added as a suburb of Milwaukee.
By 1910, 90 percent of Germans who had left German lands between 1835 and 1910 had gone to the United States.
By 1910, Milwaukee shared the distinction with New York City of having the largest percentage of foreign-born residents in the United States. In 1910, European descendants represented 99.7% of the city's total population.
In 1910, Emil Seidel began his term as mayor of Milwaukee after running on the ticket of the Socialist Party.
In 1912, Emil Seidel's term as mayor of Milwaukee came to an end.
By 1915, Milwaukee County's Polish population had risen to 100,000.
In 1916, Daniel Hoan began his term as mayor of Milwaukee after running on the ticket of the Socialist Party.
In 1919, Ogren, a pioneer brass era automobile maker, began production in Milwaukee.
From 1922 to 1926, Milwaukee was home to the NFL's Badgers.
In 1922, Ogren, a pioneer brass era automobile maker in Milwaukee, stopped production.
By 1925, around 9,000 Mexicans lived in Milwaukee.
In 1926, the Milwaukee Badgers NFL team ended.
From 1933 to 1994, the Green Bay Packers split their home schedule between Green Bay and Milwaukee.
On July 24, 1934, Milwaukee recorded its highest temperature of 105 °F (41 °C).
In 1940, Daniel Hoan's term as mayor of Milwaukee came to an end.
Hal Leonard Corporation, one of the world's largest music print publishers, was founded in 1947 and is headquartered in Milwaukee.
In 1948, Frank Zeidler began his term as mayor of Milwaukee after running on the ticket of the Socialist Party.
Milwaukee, became the center for the Schoenstatt Movement in the US when Joseph Kentenich was exiled there for 14 years from 1952.
In 1954, Charles J. Kersten, the Republican representative, lost his seat in Congress to Democrat Henry S. Reuss, marking the end of significant Republican representation in Milwaukee.
In 1955, the original Milwaukee Conservatory, which had been standing since 1898, was replaced by the Mitchell Park Horticultural Conservatory.
In 1960, African-American residents made up 15 percent of Milwaukee's population, yet the city was still among the most segregated of that time.
In 1960, Frank Zeidler's term as mayor of Milwaukee came to an end.
Milwaukee was cited in a Jet Magazine article as the most segregated city in the U.S., based on a segregation index developed in the mid-1950s and used since 1964.
Joseph Kentenich's exile in Milwaukee ended in 1965.
Since 1968, Milwaukee has been home to Summerfest, a large music festival.
Since 1970, the city's population has dropped at every census count.
In 1973, the U.S. Bank Center, the tallest building in Milwaukee, was completed.
As late as 1981, Milwaukee had the greatest brewing capacity in the world.
On January 17, 1982, Milwaukee recorded a low of −26 °F (−32 °C).
In 1988, 28-year incumbent Henry Maier retired as mayor of Milwaukee, holding the record for the longest term of service for a city of Milwaukee's size.
In 1988, with the election of Mayor John O. Norquist, Milwaukee adopted a cabinet form of government, giving the mayor greater control over department heads.
In 1990, Milwaukee became the first city in the United States to offer a school voucher program.
By 1991, the Packers claimed that revenue from the Milwaukee games were 60% of the revenue generated from the Green Bay games.
In 1992, the "good land" theory about the origin of the name Milwaukee, was popularized by a line by Alice Cooper in the comedy film Wayne's World.
In 1994, the Green Bay Packers ended their split home schedule between Green Bay and Milwaukee.
On February 4, 1996, Milwaukee recorded a low of −26 °F (−32 °C).
In 1999, Summerfest was listed in the Guinness Book of World Records as the largest music festival in the world.
In 2001, Milwaukee was ranked among the ten most dangerous large cities in the United States.
In 2002, Milwaukee was cited in a Jet Magazine article as the most segregated city in the U.S., based on a segregation index developed in the mid-1950s and used since 1964.
In 2003, a non-peer-reviewed study by researchers at the University of Wisconsin–Milwaukee claimed Milwaukee was the 43rd most integrated city in America.
In 2004, the Hmong American Peace Academy/International Peace Academy, a K–12 school system in Milwaukee centered on the Hmong community, opened.
In 2004, the Milwaukee Police Department's Gang Unit was reactivated after Nannette Hegerty was sworn in as chief.
Since 2005, Mitchell International Airport has been connected by the Amtrak Hiawatha train service.
According to the 2006–2008 American Community Survey, 38.3% of Milwaukee's residents reported having African American ancestry.
As of 2006, Milwaukee Public Schools employed 11,100 full-time and substitute teachers.
Holy Hill National Shrine of Mary, Help of Christians, northwest of Milwaukee, was made a basilica in 2006.
In 2006, 4,000 charges were brought against suspects through Milwaukee's Gang Unit.
In 2006, Milwaukee obtained bronze-level status from the League of American Bicyclists.
In 2006, Milwaukee was named one of the "Dozen Distinctive Destinations" by the National Trust for Historic Preservation.
In 2006, the installation of bicycle racks on buses was part of a settlement of an asbestos lawsuit filed by the state against the county.
As of 2007, Milwaukee Public Schools had an enrollment of 89,912 students.
In 2007, Milwaukee was again ranked among the ten most dangerous large cities in the United States.
In 2007, Milwaukee's Amtrak station was renovated to create Milwaukee Intermodal Station.
According to the 2006–2008 American Community Survey, 38.3% of Milwaukee's residents reported having African American ancestry.
In 2008, Barack Obama won Milwaukee with 77% of the vote, demonstrating the city's Democratic leanings.
In 2008, Coors beer also began to be brewed in Miller Valley in Milwaukee.
In 2008, MillerCoors, a joint venture, was formed by Milwaukee-based Miller Brewing Co. and Golden, Colorado-based Molson Coors Brewing Company.
In 2008, the city of Milwaukee identified over 250 miles of streets for bike lanes and prioritized 145 miles for immediate implementation.
The Harley-Davidson Museum, opened in 2008, pays tribute to Harley-Davidson motorcycles.
In 2009, MillerCoors ranked No. 2, Minhas Craft Brewery ranked No. 14, and New Glarus Brewing Company ranked No. 32 on the list of the 50 largest beermakers in the United States.
In 2009, Milwaukee became an "Innovating City" in the Global Compact Cities Program.
In 2009, the Milwaukee County Transit System began installing bicycle racks to the front of county buses.
According to research by demographer William H. Frey using data from the 2010 United States Census, Milwaukee had the highest level of black-white segregation of any of the 100 largest metropolitan areas in the United States.
According to the 2010 Census, 44.8% of Milwaukee's population was White and 40.0% was Black or African American. 17.3% of the population was of Hispanic, Latino, or Spanish origin.
According to the 2010 United States census, the largest Hispanic backgrounds in Milwaukee were: Mexican (69,680), Puerto Rican (24,672), among others.
As of 2010, approximately 51.8% of residents in the Milwaukee area said they regularly attended religious services.
By 2010, Milwaukee had a population of 594,833.
In 2010, $800 million in federal funds allocated to high-speed rail links from Milwaukee to Chicago and Madison were rejected by Wisconsin governor Scott Walker.
A 2011 study by Walk Score ranked Milwaukee 15th most walkable of fifty largest U.S. cities.
In 2012, Milwaukee was listed as a gamma city by the Globalization and World Cities Research Network.
In 2013, Mark Pfeifer, the editor of the Hmong Studies Journal, stated Hmong in Milwaukee had recently been moving to the northwest side of Milwaukee.
In 2013, Milwaukee's park system was ranked as the 19th best among the 50 most populous U.S. cities by The Trust for Public Land.
In 2013, there were 105 murders in Milwaukee.
In August 2014, Milwaukee debuted a bicycle sharing system called Bublr Bikes, in partnership with Midwest Bike Share.
In 2014, Milwaukee's main port, Port of Milwaukee, handled 2.4 million metric tons of cargo through its municipal port.
On February 10, 2015, the Milwaukee Common Council approved a streetcar connecting the Milwaukee Intermodal Station with the Lower East Side, allocating a $124 million capital budget.
As of May 2015, Interstate 894 also contains Interstate 41.
In July 2015, Mitchell International Airport served 610,271 passengers.
Construction on the $524 million Fiserv Forum project began in November 2015.
A 2015 study by Walk Score ranked Milwaukee as the 15th most walkable out of the 50 largest U.S. cities, with an overall score of 62 out of 100.
In 2015, 146 people were killed in Milwaukee.
In 2015, 17.9% of city of Milwaukee households were without a car.
In 2015, Interstate 41 was approved, following I-94 north from the state line before turning west at the Mitchell Interchange.
In 2015, Journal Communications was split into the Journal Media Group for publishing, while the television and radio stations went to the E. W. Scripps Company.
In 2015, Milwaukee was rated as the "worst city for black Americans" due to disparities in employment and income levels, high levels of incarceration, and a severe educational achievement gap.
Since 2015, nearly two dozen craft brewing companies have been established in Milwaukee.
According to the American Community Survey estimates for 2016-2020, the median household income in Milwaukee was $43,125. 24.6% of the population was below the poverty line.
As of 2016, Milwaukee ranked as the second poorest U.S. city with over 500,000 residents, falling behind only Detroit.
In 2016, 18.7% of city of Milwaukee households were without a car, compared to a national average of 8.7%.
In 2016, Journal Media Group merged with Gannett.
In 2016, WisDOT and IDOT conducted studies to upgrade service on the Amtrak Hiawatha line from seven to ten times daily between downtown Milwaukee and downtown Chicago.
Construction on the Milwaukee Streetcar began in March 2017, with the anticipation of initial operation by mid-2018.
In 2017, Summerfest attracted 831,769 attendees.
On August 26, 2018, Fiserv Forum, a new multipurpose arena, opened to the public, intended as the focal point of a live block zone.
Since October 2018, when Milwaukee enacted a Complete Streets policy, the city continuously considers the addition of bicycle facilities to roadways as part of new road projects.
On November 2, 2018, the initial M-Line of Milwaukee's modern streetcar system, The Hop, opened for service.
In 2018, Milwaukee mayor Tom Barrett announced that the city would uphold its obligations under the Paris Agreement, despite the United States' withdrawal.
In 2018, Milwaukee was ranked the eighth most dangerous city in the US.
In 2018, Milwaukee was voted "The Coolest City in the Midwest" by Vogue.
In 2018, Scripps sold the radio stations to Good Karma Brands, effectively splitting off the monopoly completely.
In 2018, the Milwaukee Streetcar project, later named The Hop, was expected to begin initial operation as a free transit system.
In late 2018, Fiserv Forum opened in Milwaukee, hosting sporting events and concerts.
As of 2019, at least three out of four black residents in Milwaukee would have to move to create racially integrated neighborhoods.
In 2019, Milwaukee obtained silver-level status from the League of American Bicyclists.
In 2019, more than 10% of children tested positive for dangerous lead levels in their blood.
The Lakefront service for The Hop was expected to start operation by 2019.
According to the American Community Survey estimates for 2016-2020, the median household income in Milwaukee was $43,125. 24.6% of the population was below the poverty line.
In 2020, Milwaukee had a population of 577,222, with a density of 6,001.2 inhabitants per square mile. There were 257,723 housing units, and the population was ethnically diverse, including 20.1% Hispanic or Latino.
In 2020, Milwaukee had a regional GDP of over $102 billion.
In 2020, the census recorded Milwaukee's population as 577,222, making it the 31st-most populous city in the United States.
In the 2020 census, the population of Milwaukee included 1,198 people incarcerated in adult correctional facilities and 9,625 people in university student housing.
In January 2021, the St. Sava Serbian Orthodox Cathedral put the American Serb hall up for sale due to financial challenges caused by the COVID-19 pandemic.
As a result of the 2021 infrastructure bill and the "Amtrak Connects Us" initiative, the Milwaukee Intermodal Station is again projected to serve passenger trains to Madison and Green Bay.
As of 2021, there were more than 3,000 drinking fountains in the Milwaukee Public School District, and 183 had lead levels above 15 parts per billion (ppb).
In 2021, Tom Barrett retired as mayor, becoming the longest-serving mayor of any of the United States' 50 largest cities.
According to the 2022 American Community Survey, 66% of working city of Milwaukee residents commuted by driving alone.
As of 2022, Milwaukee had 195 miles (314 km) of on-street bicycle facilities.
As of 2022, the estimated number of homeless people on Milwaukee's streets had reduced to 832.
Per the 2022 American Community Survey five-year estimates, the German American population was 87,601.
Per the 2022 American Community Survey five-year estimates, the Hmong American population was 11,469, the largest Hmong population in Wisconsin.
As of August 2023, the Bublr Bikes system operates over 100 stations in Milwaukee, West Allis and Wauwatosa.
On October 29, 2023, service to the lakefront, through the Couture, on the L-Line of Milwaukee's streetcar system The Hop, opened.
Per the 2023 American Community Survey one-year estimates, the Mexican American population was 82,845 comprising over 60% of the Latino population.
In 2024, Architectural Digest rated Milwaukee's skyline as the 15th most beautiful skyline in the world.
By 2025, Milwaukee set a goal of moving a quarter of the city's electricity sources to renewable energy.
By 2026, Milwaukee set a goal of increasing their protected bicycle lanes from 2.6 miles (4.2 km) to 50 miles (80 km).
The goal is for the new passenger train routes to Madison and Green Bay, served by the Milwaukee Intermodal Station, to be operational by 2035.