The incumbent mayor, Bruno Reis, of the Brazil Union (UNIÃO), is able to run for a second term.

[1] The last mayoral election in Rio de Janeiro, held in 2020, resulted in a largest victory of Bruno Reis (DEM) in the first round.

He had been vice mayor of the municipality under popular incumbent ACM Neto.

[2] Reis later supported ACM Neto's unsuccessful bid for governor in 2022.

Bruno Reis and Geraldo Júnior Hypothetical scenario with João Roma Bruno Reis and João Roma In some opinion polls, the interviewee can choose more than one alternative (the so-called "multiple rejection"), therefore, the sum of the percentages of all candidates can exceed 100% of the votes in some scenarios The result of the last municipal election and the current situation in the Municipal Chamber is given below: