The 23rd Arizona State Legislature, consisting of the Arizona State Senate and the Arizona House of Representatives, was constituted in Phoenix from January 1, 1957, to December 31, 1958, during the second of two terms of Ernest McFarland's time as Governor of Arizona. The number of senators remained constant at two per county, totaling 28, while the number of members of the House of Representatives decreased from 81 to 80. The balance in the upper house continued at a 26–2 margin in favor of the Democrats. In the House, the Republicans picked up three seats, while Democrats lost four seats, however the Democrats still held a 57–23 edge.
The 24th Arizona State Legislature, consisting of the Arizona State Senate and the Arizona House of Representatives, was constituted in Phoenix from January 1, 1959, to December 31, 1960, during the first of three terms of Paul Fannin's time as Governor of Arizona. The number of senators remained constant at two per county, totaling 28, and the members of the house of representatives also held steady at 80. The Democrats picked up a seat in the upper house, increasing their edge to 27–1. In the House, the Republicans picked up three seats, however the Democrats still held a 55–25 edge.
The 1956 Arizona Senate election was held on November 6, 1956. Voters elected all 28 members of the Arizona Senate to serve two-year terms. At the time, each of Arizona's 14 counties elected two state senators for a total of 28 members of the Arizona Senate. Primary elections were held on September 11, 1956.
The 1960 Arizona Senate election was held on November 8, 1960. Voters elected all 28 members of the Arizona Senate to serve two-year terms. At the time, each of Arizona's 14 counties elected two state senators for a total of 28 members of the Arizona Senate. Primary elections were held on September 13, 1960.
The 1962 Arizona Senate election was held on November 6, 1962. Voters elected all 28 members of the Arizona Senate to serve two-year terms. At the time, each of Arizona's 14 counties elected two state senators for a total of 28 members of the Arizona Senate. Primary elections were held on September 11, 1962.
The 1964 Arizona Senate election was held on November 3, 1964. Voters elected all 28 members of the Arizona Senate to serve two-year terms. At the time, each of Arizona's 14 counties elected two state senators for a total of 28 members of the Arizona Senate. Primary elections were held on September 8, 1964.
The 1966 Arizona Senate election was held on November 8, 1966. Voters elected all 30 members of the Arizona Senate to serve two-year terms. Following the landmark Reynolds v. Sims (1964) US Supreme Court decision, every state had to redraw state electoral districts to be approximately equal in population. Before Reynolds, the Arizona Senate consisted of 28 members with two elected Senators from each of the state's 14 counties. After the ruling, the Arizona Senate shifted to electoral districts.
The 1968 Arizona Senate election was held on November 5, 1968. Voters elected all 30 members of the Arizona Senate to serve two-year terms.
The 1970 Arizona Senate election was held on November 3, 1970. Voters elected all 30 members of the Arizona Senate to serve two-year terms. The 1970 election ushered in the restructuring of the Arizona Legislature to its current format. There are 30 electoral districts across the state, each district electing a single state senator and two state representatives.
The 1980 Arizona Senate election was held on November 4, 1980. Voters elected members of the Arizona Senate in all 30 of the state's legislative districts to serve a two-year term. Primary elections were held on September 9, 1980.
The 1984 Arizona Senate election was held on November 6, 1984. Voters elected members of the Arizona Senate in all 30 of the state's legislative districts to serve a two-year term. Primary elections were held on September 11, 1984.
The 1992 Arizona Senate election was held on November 3, 1992. Voters elected members of the Arizona Senate in all 30 of the state's legislative districts to serve a two-year term. Primary elections were held on September 8, 1992.
The 1994 Arizona Senate election was held on November 8, 1994. Voters elected members of the Arizona Senate in all 30 of the state's legislative districts to serve a two-year term. Primary elections were held on September 13, 1994.
The 1998 Arizona Senate election was held on November 3, 1998. Voters elected members of the Arizona Senate in all 30 of the state's legislative districts to serve a two-year term. Primary elections were held on September 8, 1998.
The 2004 Arizona Senate election was held on November 2, 2004. Voters elected members of the Arizona Senate in all 30 of the state's legislative districts to serve a two-year term. Primary elections were held on September 7, 2004.
The 2006 Arizona Senate election was held on November 7, 2006. Voters elected members of the Arizona Senate in all 30 of the state's legislative districts to serve a two-year term. Primary elections were held on September 12, 2006.
The 2010 Arizona Senate election was held on November 2, 2010. Voters elected members of the Arizona Senate in all 30 of the state's legislative districts to serve a two-year term. Primary elections were held on August 24, 2010.
The 2012 Arizona Senate election was held on November 6, 2012. Voters elected members of the Arizona Senate in all 30 of the state's legislative districts to serve a two-year term. These were the first elections following the 2010 redistricting cycle. Since passage of Proposition 106 in 2000, redistricting in Arizona is done by the Arizona Independent Redistricting Commission (AIRC). Following redistricting, many incumbents were moved into new districts. Primary elections were held on August 28, 2012.
The 1958 Arizona House of Representatives elections were held on November 4, 1958. Voters elected members of the Arizona House of Representatives in all 80 of the state's House districts to serve a two-year term. The elections coincided with the elections for other offices, including Governor, U.S. Senate, U.S. House, and State Senate. Primary elections were held on September 9, 1958.
The 1960 Arizona House of Representatives elections were held on November 8, 1960. Voters elected members of the Arizona House of Representatives in all 80 of the state's House districts to serve a two-year term. The elections coincided with the elections for other offices, including Governor, U.S. House, and State Senate. Primary elections were held on September 13, 1960.
