The Mayor of Porto Alegre, Brazil, is the Chief Executive of the city. Mayors serve a four-year term, limited to one re-election. Mayoral activities are regulated by Sections IV, V, VI, Chapter VI of Porto Alegre City Charter. The current mayor is Sebastião Melo, since January 1st 2021; he is the 45th mayor of Porto Alegre.
Porto Alegre City Charter provides a succession line for any case of office vacancy. The first in line is the Deputy Mayor of Porto Alegre (who is elected in the same ticket of the Mayor), next is the Speaker of Porto Alegre City Council and, lastly, the Porto Alegre Attorney-General.