Parliamentary elections were held in Chile on 29 and 30 March 1840, during the presidency of José Joaquín Prieto. They were the final parliamentary elections of Prieto's administration and produced a decisive victory for the government. Of the 56 deputies elected, only nine were identified as opposition representatives, while all eight senators elected, including one replacement for the deceased senator Diego Portales, were government supporters.
Parliamentary elections were held in Chile on 26 March 1837 during the presidency of José Joaquín Prieto. The election took place under a state of exception declared in preparation for the war against the Peru–Bolivian Confederation. Fifty-two deputies were elected to the Chamber of Deputies, while seven of the Senate's 20 seats were due for renewal. The results strongly favored the government, with contemporary accounts describing the election as largely uncontested and the academic reconstruction of the returns finding no identifiable opposition seats.
Parliamentary elections were held in Chile on 30 March 1834 during the presidency of José Joaquín Prieto. They were the first parliamentary elections held under the Constitution of 1833 and renewed the entire National Congress. Fifty-six deputies were elected directly, while the 20 senators were chosen indirectly through provincial electoral colleges. The election produced a large government majority and was marked by a sharp reduction in the number of registered electors compared with the preceding electoral system, reflecting the more restrictive application of census suffrage.
The 1829 Chilean parliamentary election was held on 7 and 8 June 1829 to elect members of the Chamber of Deputies under the Constitution of 1828. It produced a decisive victory for the liberal faction supporting the government of Francisco Antonio Pinto, which won more than two-thirds of the deputy seats. The election was held amid growing political conflict between liberals and conservatives, which soon developed into the Chilean Civil War of 1829–1830.
The election formed the Chamber of Deputies of the first bicameral Congress established under the 1828 Constitution. The Chamber was composed of between 55 and 57 members, elected directly, while the 16-member Senate had already been selected by the Constituent Congress in 1828. The election also marked the first use of an indirect electoral system for choosing presidential electors, a system that remained in use for presidential elections until the 1925 Constitution introduced direct presidential elections.