The 2031 Pan American Games (), officially the XXI Pan American Games () will be an international multi-sport event governed by the Panam Sports Organization.
Bidding process.
Two bids met the 30 April deadline. The bidding process to determine the host of the 2031 Pan American Games will be held from 5-7 August 2025 in Asunción, a few days before the start of the 2025 Junior Pan American Games in the same city.
* Asunción, Paraguay (with surfing in El Salvador)
Asunción will host the 2025 Junior Pan American Games and was the runner-up during the second selection of the 2027 Pan American Games, in which Lima, Peru eventually won. The city officially launched their candidacy on 26 December 2024. If their bid was successful, it could be the first time that Paraguay was to host the main Pan American Games. As Paraguay is a landlocked country, the surfing events would be held in El Salvador, as confirmed by the El Salvador Olympic Committee, which would make it the first continental Central American country to host any Pan American Games event.. An article by The Sports Examiner suggested that Asuncion could bid for and host the 2031 Pan American Games "without delay" after making a "forceful and memorable" case to host the 2027 Pan American Games. A letter of guarantee was signed on 30 January 2025, around the same time the Paraguayan Olympic Committee expressed interest in bidding for the 2030 Summer Youth Olympics.
* Rio de Janeiro and Niterói, Brazil
 Both cities launched a joint application, with Rio as the main host, and Niterói co-hosting the outdoor and some indoor sports modalities, sent to the Brazilian Olympic Committee on 3 December 2024. The application project is idealized by the vice-mayor of Niterói, bronze medalist sailing athlete Isabel Swan, who is also president of the Panam Sports Athletes Commission. Rio de Janeiro previously hosted the 2007 Pan American Games and the 2016 Summer Olympics. The potential estimated budget for the Games is R$3.7 billion (US$667 million). This project's proposal is to reuse as much as possible the facilities left as a legacy from both previous games, in addition to existing and some new facilities in the neighboring city (part of them already in construction). The bid has also proposed the construction of the Pan American Village in the region of Porto Maravilha. If this bid were to host the Games, Rio would be the fourth city to host the games twice after Winnipeg, Canada; Mexico City, Mexico; and Lima, Peru; it would be the first time Niterói hosting an international multi-sport event; and it would also make Brazil the third country after Mexico and Canada to host the games thrice. Once São Paulo withdrew their bid, the cities' application to officially become the Brazilian bid was confirmed during a COB assembly in 29 January 2025. According to Guilherme Schleder, the bid’s committee coordinator, they intend to talk to the Paraguayan bid to reach an agreement and guarantee the event in Brazil in 2031, leaving it to the neighboring country to organize the following one, in 2035.
* Charlotte, United States
 An article from WSOC-TV speculated Charlotte's odds of hosting major sporting events such as the 2031 Pan American Games and 2040 Olympics after Charlotte City Council approved US$650 million in renovations to Bank of America Stadium. A regional bid stretching into other North Carolina cities such as Greensboro is also possible.
* Winnipeg, Canada
Winnipeg previously hosted the 1967 and 1999 Pan American Games. The city council was said to be exploring a bid for the 2031 Pan American Games as of November 2021.
* São Paulo, Brazil
 The city officially launched their bid for the 2031 edition in Santiago, Chile, a day before their 2023 Pan American Games began. São Paulo previously hosted the 1963 Pan American Games. But the city began to have internal competition within the Brazilian Olympic Committee, with the joint candidacy of Rio and Niterói, in November 2024. The entity had until 31 January 2025 to present the chosen application to be the Brazilian bid for Panam Sports. However, São Paulo withdrawn their bid in 16 January 2025 and showed support for the Rio-Niterói candidacy