The incumbent mayor, Sebastião Melo, a member of the Brazilian Democratic Movement (MDB), was elected in 2020[1] for his first term and ran for reelection.

[3] The last mayoral election in Porto Alegre, held in 2020, resulted in the victory of the lawyer and politician Sebastião Melo in the second round.

[1] In a poll conducted in the end of March 2024, Melo's government was approved by 58% of the citizens of Porto Alegre, making him the front-runner in most of the election scenarios.

[4] However, after the 2024 Rio Grande do Sul floods that happened in the end of April to May, that also affected the city of Porto Alegre, his lead in polls may be contested.

However, the president of the Superior Electoral Court, Alexandre de Moraes, confirmed on 21 May 2024 that there is no discussions about a postponement.