At the end of the event, Zozibini Tunzi of South Africa was crowned as Miss Universe 2019 by Catriona Gray of the Philippines. It was South Africa's third win after 1978 and their recent victory in 2017. This edition also saw the crowning of the first black woman from the country to win and the first since Leila Lopes of Angola in 2011.
This edition marked the debuts of Bangladesh and Equatorial Guinea, and the returns of Lithuania, Romania, Sierra Leone and Tanzania. Lithuania last competed in 2014, Sierra Leone in 2016, and the others in 2017. Ghana, Greece, Guatemala, Hungary, Kyrgyzstan, Lebanon, Russia, Sri Lanka, Switzerland and Zambia withdrew. Before the pageant, the Miss Universe Ghana organization was suspended temporarily and resumed operations in 2020. Erika Kolani of Greece was unable to compete for undisclosed reasons. Lebanon withdrew from the competition after the Miss Lebanon 2019 competition was continuously postponed and ultimately canceled due to the 2019–20 Lebanese protests. Alina Sanko, Miss Russia 2019, was originally going to be sent to both Miss Universe and Miss World 2019, but was unable to do so due to overlapping dates. The Miss Russia organization was unable to finalize replacement plans for Miss Universe due to the length of time it took for the Miss Universe Organization to publish details about its date and venue, making it difficult for the Russian entrant to receive an American visa. However, Sanko did compete in Miss Universe 2020. Zambia withdrew from the competition after Didia Mukwala, Miss Universe Zambia 2019, and the Miss Universe Zambia organization failed to book Mukwala's trip to Atlanta due to their organization's financial situation.
Same with 2018, twenty semi-finalists were chosen through the preliminary competition— composed of the swimsuit and evening gown competitions and closed-door interviews. After a two-year absence, Internet voting returned, with the public being able to vote a candidate into the top twenty through online voting. The continental format returned for the third year, with five semifinalists from the Americas, Europe, Africa & Asia-Pacific, and wildcards coming from any continental region. The twenty semi-finalists competed in the opening statement round, introduced in 2018, featuring each semifinalist giving a short introduction to themselves and their platforms. Afterward, ten semi-finalists advanced to compete in the swimsuit and evening gown rounds. From ten, five finalists were chosen to compete in the first question and answer round, while three finalists were chosen to compete in the final word. The three finalists also gave their closing statements before the coronation. It is the first time the closing statement round was used, replacing the final walk portion.
In December 2018, Filipino politician and businessman Chavit Singson of the LCS Group of Companies, who financed Miss Universe 2016, stated that the 2019 edition of the pageant would be in Seoul, South Korea, which previously hosted Miss Universe 1980. He added that he would assist in preparations for the competition in South Korea, although the details were not finalized; the Miss Universe Organization had never confirmed this.
Later, in April 2019, it was reported that both the Philippines and Rio de Janeiro, Brazil were interested in hosting the competition. Interest in the Philippines grew following the win of Filipina Catriona Gray in Miss Universe 2018, looking to crown her successor in her home country, as Pia Wurtzbach did at Miss Universe 2016. Meanwhile, Rio de Janeiro will be declared the World Capital of Architecture by UNESCO for 2020, and was looking to host more international events in the city in anticipation of this title. In August 2019, Israel was also reportedly interested in hosting the competition. With a plan created by producers Danny Benaim and Assaf Blecher, talks regarding hosting the competition in Israel emerged after Tel Aviv successfully hosted the Eurovision Song Contest 2019. They stated that Israel was also interested in hosting the pageant on next two years. The country later hosted the Miss Universe 2021 in Eilat.
In May 2019, Richelle Singson-Michael, the daughter of Chavit Singson, stated that the Philippines was one of several countries bidding to host the 2019 competition, and that her family's business LCS Group was committed to hosting either in the Philippines or in South Korea.
On 31 October 2019, the Miss Universe Organization confirmed that the competition would be at Tyler Perry Studios in Atlanta, Georgia on 8 December 2019.
Miss Universe 2019 was the 68th Miss Universe pageant, held at Stage 1 of Tyler Perry Studios in Atlanta, Georgia, United States on 8 December 2019.