1857 Riograndense legislative election (RRG)

The 1857 Riograndense legislative election was held in the middle of President Netto's second presidential term to elect all members of and one third of the members of the Senate. The election resulted in a victory for the ruling Radical Party as it gathered a supermajority in both houses despite a reduced share of the popular vote. The 1857 elections solidified the Party of Order's position as the main opposition force to the current government as the Conservative Party collapsed and lost of its seats in the Chamber.

The members of the Chamber of Deputies were elected from single-member constituencies via first-past-the-post while the senators were chosen using open-list proportional representation from a nationwide district.