The 2nd Arizona State Legislature, consisting of the Arizona State Senate and the Arizona House of Representatives, was constituted from January 1, 1915, to December 31, 1916, during the second term of George W. P. Hunt as Governor of Arizona, in Phoenix. The number of senators and representatives remained constant, at 19 and 35 respectively. The Democrats increased their lead in both houses, winning 18 of the 19 senate seats, and winning a clean sweep of the house, 35–0.
The 13th Arizona State Legislature, consisting of the Arizona State Senate and the Arizona House of Representatives, was constituted in Phoenix from January 1, 1937, to December 31, 1938, during Rawghlie Clement Stanford's first and only term as Governor of Arizona. The number of senators and representatives remained constant, with 19 and 51 members respectively. While the Democrats regained one hundred percent of the senate seats, the Republicans broke the Democrats complete domination in the house, managing to obtain a single seat, one of the two from Navajo County.
The 15th Arizona State Legislature, consisting of the Arizona State Senate and the Arizona House of Representatives, was constituted in Phoenix from January 1, 1941, to December 31, 1942, during the first of Sidney Preston Osborn's four consecutive terms as Governor of Arizona. The number of senators and house representatives remained constant at 19 and 52, respectively. The Democrats controlled one hundred percent of both the senate and house seats.
The 17th Arizona State Legislature, consisting of the Arizona State Senate and the Arizona House of Representatives, was constituted in Phoenix from January 1, 1945, to December 31, 1946, during the third of Sidney Preston Osborn's four consecutive terms as Governor of Arizona. The number of senators and house members remained constant at 19 and 58, respectively. The Democrats controlled one hundred percent of the senate. while the Republicans gained a single house seat.
The 18th Arizona State Legislature, consisting of the Arizona State Senate and the Arizona House of Representatives, was constituted in Phoenix from January 1, 1947 to December 31, 1948, during the fourth of Sidney Preston Osborn's four consecutive terms as Governor of Arizona. The number of senators and house members remained constant at 19 and 58, respectively. The Democrats controlled one hundred percent of the senate. while the Republicans gained four house seats, to a total of five.
The 19th Arizona State Legislature, consisting of the Arizona State Senate and the Arizona House of Representatives, was constituted in Phoenix from January 1, 1949, to December 31, 1950, during the first year of Dan Edward Garvey's first full term as Governor of Arizona. The number of senators and house members remained constant at 19 and 58, respectively. The Democrats controlled one hundred percent of the senate, while the Republicans gained two house seats, to a total of seven.
The 20th Arizona State Legislature, consisting of the Arizona State Senate and the Arizona House of Representatives, was constituted in Phoenix from January 1, 1951, to December 31, 1952, during the first two years of John Howard Pyle's term as Governor of Arizona. The number of senators remained constant at 19, while the members of the house of representatives increased from 58 to 68. The Democrats controlled one hundred percent of the senate, while in the house the Democrats increased six seats and the Republicans gained four seats, giving the Democrats a 57–11 edge.
The 21st Arizona State Legislature, consisting of the Arizona State Senate and the Arizona House of Representatives, was constituted in Phoenix from January 1, 1953, to December 31, 1954, during the last two years of John Howard Pyle's term as Governor of Arizona. The number of senators remained constant at 19, while the members of the house of representatives increased from 68 to 80. The Republicans picked up four Senate seats, leaving the Democrats in control of the upper house with a 15–4 margin. In the House, the Republicans picked up nineteen seats, while the number of seats controlled by the Democrats decreased by seven, giving the Democrats a 50–30 edge.
The 22nd Arizona State Legislature, consisting of the Arizona State Senate and the Arizona House of Representatives, was constituted in Phoenix from January 1, 1955, to December 31, 1956, during the first of two terms of Ernest McFarland's time as Governor of Arizona. The number of senators was increased to two per county, for a total of 28, while the members of the house of representatives increased from 80 to 81. The Republicans lost two Senate seats, leaving the Democrats in control of the upper house with a 26–2 margin. In the House, the Republicans lost ten seats, while the number of seats controlled by the Democrats increased by eleven, giving the Democrats a 61–20 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 54–26 edge.
The 29th Arizona State Legislature, consisting of the Arizona State Senate and the Arizona House of Representatives, was constituted in Phoenix from January 1, 1969, to December 31, 1970, during Jack Williams' second term as Governor of Arizona. The number of senators remained constant at 30, and the members of the house of representatives also held steady at 60. The Republicans picked up a single seat in the Senate, giving them a 17–13 edge in the upper house, and the Republicans also gained one seat in the lower house, increasing their margin to 34–26.
The 33rd Arizona State Legislature, consisting of the Arizona State Senate and the Arizona House of Representatives, was constituted in Phoenix from January 1, 1977, to December 31, 1978. The legislature met during the terms of three Arizona Governors. When it was constituted, Raúl Héctor Castro still had two years remaining on his only term in office as Governor of Arizona. When Castro left the office to become Ambassador to Argentina in October 1977, he was succeeded by Wesley Bolin, Arizona's Secretary of State. Arizona's constitution mandates that the Secretary of State is first in line of succession to the office of Governor. However, Bolin died in office five months later, on March 4, 1978, and was succeeded by Bruce Babbitt, who was then the Attorney General. Bolin was not succeeded by his replacement, Rose Mofford, because she had been appointed, not elected to the office. Succession fell to the next in line, Babbitt. Both the Senate and the House membership remained constant at 30 and 60, respectively. The Republicans made inroads into the Democrat lead in the Senate, picking up two seats, although the Democrats maintained a 16–14 edge in the upper house. In the lower chamber, the Republicans increased their majority by 5 seats, giving them a 38–22 margin.
The 34th Arizona State Legislature, consisting of the Arizona State Senate and the Arizona House of Representatives, was constituted in Phoenix from January 1, 1979, to December 31, 1980, during the first two years of Bruce Babbitt's first full term as Governor of Arizona. Both the Senate and the House membership remained constant at 30 and 60, respectively. The Republicans managed to regain control of the Senate by picking up two seats, giving them a 16–14 edge in the upper house. In the lower chamber, the Republicans increased their majority by 4 seats, giving them a 42–18 margin.
The 36th Arizona State Legislature, consisting of the Arizona State Senate and the Arizona House of Representatives, was constituted in Phoenix from January 1, 1983, to December 31, 1984, during the first two years of Bruce Babbitt's second full term as Governor of Arizona. Both the Senate and the House membership remained constant at 30 and 60, respectively. The Republicans increased their lead in the Senate by two seats, giving them an 18–12 edge in the upper house, while the Democrats gained four seats in the lower house, although the Republicans still held a 39–21 majority.
The 41st Arizona State Legislature, consisting of the Arizona State Senate and the Arizona House of Representatives, was constituted in Phoenix from January 1, 1993, to December 31, 1994, during the second two years of Fife Symington's first term as governor. Both the Senate and the House membership remained constant at 30 and 60, respectively. The Republicans flipped control in the Senate, gaining five seats and creating a Republican majority at 18–12. The Republicans gained two seats in the house, increasing their majority to 35–25.
The 42nd Arizona State Legislature, consisting of the Arizona State Senate and the Arizona House of Representatives, was constituted in Phoenix from January 1, 1995, to December 31, 1996, during the first two years of Fife Symington's second term as governor. Both the Senate and the House membership remained constant at 30 and 60, respectively. The Republicans increased their control in the Senate, gaining a seat and giving the a 19-11 majority. The Republicans also gained seats in the house, increasing their majority to 38–22.
The 44th Arizona State Legislature, consisting of the Arizona State Senate and the Arizona House of Representatives, was constituted in Phoenix from January 1, 1999, to December 31, 2000, during the first two years of Jane Dee Hull's first full term in office. Both the Senate and the House membership remained constant at 30 and 60, respectively. The Republicans lost two seats in the Senate, but still held a 16-14 majority. The Republicans gained two seats in the House, maintaining their majority in the lower chamber, 40–20.
The 49th Arizona State Legislature, consisting of the Arizona State Senate and the Arizona House of Representatives, was constituted in Phoenix from January 1, 2009, to December 31, 2010, during the final month of Janet Napolitano's second term in office, prior to her resignation to become United States Secretary of Homeland Security, and the first two years of her successor, Jan Brewer. Both the Senate and the House membership remained constant at 30 and 60, respectively. The Republicans gained a seat in the Senate, increasing the majority to 18–12. The Republicans also gained two seats in the lower chamber, giving them a 35–25 majority.
The 50th Arizona State Legislature, consisting of the Arizona State Senate and the Arizona House of Representatives, was constituted in Phoenix from January 1, 2011, to December 31, 2012, during the first two years of Jan Brewer's first full term in office. Both the Senate and the House membership remained constant at 30 and 60, respectively. The Republicans gained three seats in the Senate, increasing their majority to 21–9. The Republicans also gained five seats in the lower chamber, giving them a 40–20 majority.
The 51st Arizona State Legislature, consisting of the Arizona State Senate and the Arizona House of Representatives, was constituted in Phoenix from January 1, 2013, to December 31, 2014, during the last two years of Jan Brewer's first full term in office. Both the Senate and the House membership remained constant at 30 and 60, respectively. The Democrats gained five seats in the Senate, decreasing the Republican majority to 16–14. The Democrats also gained four seats in the lower chamber, leaving the Republicans with a 36–24 majority.
