1840 Riograndense Constituent Assembly election (RRG)

Elections were held on October 11, 1840 in order to elect the thirty-six members of the Constituent Assembly that would be tasked with writing what would eventually become the 1841 Constitution. The election was held using single non-transferable vote (SNTV). While no formal political parties existed, the assembly was entirely composed of republicans and the main political divide was drawn along the lines of support or opposition for the abolition of slavery.

The Assembly would meet for a short period of two months and it would adopt the Constitution that was drafted by José Pinheiro de Ulhôa Cintra, Francisco de Sá Brito, José Mariano de Matos, Serafim dos Anjos França and Domigo José de Almeida on February 8, 1841. The 1841 Constitution would be the foundation of the conservative First Republic.