Brazil Senate election 2018 — Results
Election day: October 7, 2018
- MDB: 12 seats
- PSDB: 9 seats
- PSD: 7 seats
- PT: 6 seats
- DEM: 6 seats
- PP: 5 seats
- REDE: 5 seats
- Podemos: 5 seats
About this election
The voting system
The Federal Senate has 81 members — three for each of the 26 states and the Federal District — serving eight-year terms. The chamber is renewed in alternating cycles of one-third and two-thirds: in 2018 two seats per state (54 in total) were contested simultaneously by first-past-the-post, with voters casting two votes. Because senators represent whole states equally regardless of population, the Senate gives disproportionate weight to smaller, often more rural states, and its composition is decisive for confirming appointments and constitutional change.
Compiled and reviewed from official results by ElectioMap. See our data methodology.
Understanding this election
- Why Official Results Sometimes Take Weeks — the stages between the count and the legal result
- Why Turnout Figures Disagree — why two sources publish different turnout for one election
- D’Hondt vs Sainte-Laguë — how a divisor formula turns vote shares into seats