Next Brazil Senate Election: Most Seats Held
- Will Partido Novo (NOVO) hold the most seats as a result of the next Brazilian Senate election?<1¢
- Will Movimento Democrático Brasileiro (MDB) hold the most seats as a result of the next Brazilian Senate election?5¢
- Will Progressistas (PP) hold the most seats as a result of the next Brazilian Senate election?2¢
- Will Partido Socialista Brasileiro (PSB) hold the most seats as a result of the next Brazilian Senate election?<1¢
- Will Republicanos (REPUBLICANOS) hold the most seats as a result of the next Brazilian Senate election?<1¢
- Will Partido Democrático Trabalhista (PDT) hold the most seats as a result of the next Brazilian Senate election?1¢
- Will Partido Liberal (PL) hold the most seats as a result of the next Brazilian Senate election?87¢
- Will Partido dos Trabalhadores (PT) hold the most seats as a result of the next Brazilian Senate election?<1¢
- Will União Brasil (UNIÃO) hold the most seats as a result of the next Brazilian Senate election?3¢
- Will Podemos (PODEMOS) hold the most seats as a result of the next Brazilian Senate election?<1¢
- Will Partido da Social Democracia Brasileira (PSDB) hold the most seats as a result of the next Brazilian Senate election?1¢
- Will Partido Social Democrático (PSD) hold the most seats as a result of the next Brazilian Senate election?<1¢
The next federal Senate election is scheduled to take place in Brazil on October 4, 2026, in which two-thirds of the Senate’s 81 seats will be contested. This market will resolve according to the political party that holds the greatest number of seats in the next Brazilian Senate as a result of the next Brazilian Senate election. All seats, not only the ones contested in the next Brazilian Senate election, will be considered. In the event of a tie between multiple parties for the most seats held, this market will resolve in favor of the party whose listed abbreviation appears first in alphabetical order. This market's resolution will be based solely on the number of seats held by the named party in the Brazilian Senate as a result of the next Brazilian Senate election, not by any federation or coalition it may be a part of. If the result of this election isn't known definitively by June 30, 2027, 11:59 PM ET, the market will resolve to "Other". This market will resolve based on the result of the election, as indicated by a consensus of credible reporting. If there is ambiguity, this market will resolve based solely on the official results as reported by the Brazilian government, specifically the Superior Electoral Court (Tribunal Superior Eleitoral, TSE) (e.g., www.tse.jus.br/eleicoes/resultados-eleicoes) or the Brazilian Senate (https://www25.senado.leg.br/web/senadores/em-exercicio/-/e/por-partido).
PL leads trader consensus for the October 2026 Brazilian Senate election, in which 54 of 81 seats renew through first-past-the-post contests electing two senators per state, due to the Liberal Party's consolidated right-leaning base, aggressive candidate recruitment in key states, and coattails from Senator Flávio Bolsonaro's presidential bid. Current Senate composition shows PL holding 16 seats ahead of PSD and MDB, while recent national polling reflects polarized dynamics that favor PL's organizational edge over centrist and left-leaning parties despite President Lula's competitive standing. Market prices assign only single-digit chances to alternatives such as MDB or UNIÃO, underscoring limited perceived paths for other blocs to secure the largest post-election bench.