The 6th Arizona State Legislature, consisting of the Arizona State Senate and the Arizona House of Representatives, was constituted from January 1, 1923, to December 31, 1924, during the last two years of George W. P. Hunt's fourth tenure as Governor of Arizona, in Phoenix.
The 8th Arizona State Legislature, consisting of the Arizona State Senate and the Arizona House of Representatives, was constituted from January 1, 1927, to December 31, 1928, during the first and second years of George W. P. Hunt's sixth tenure as Governor of Arizona, in Phoenix. The number of senators remained constant at 19, while the number of representatives increased from 47 to 52. The Democrats held large majorities in both houses.
The 9th Arizona State Legislature, consisting of the Arizona State Senate and the Arizona House of Representatives, was constituted from January 1, 1929, to December 31, 1930, during the first and second years of John Calhoun Phillips's tenure as Governor of Arizona, in Phoenix. The number of senators remained constant at 19, while the number of representatives increased from 52 to 54. The Democrats held large majorities in both houses, although the Republicans made significant inroads in the House.
The 10th Arizona State Legislature, consisting of the Arizona State Senate and the Arizona House of Representatives, was constituted from January 1, 1931, to December 31, 1932, during the first and second years of George W. P. Hunt's seventh tenure as Governor of Arizona, in Phoenix. The number of senators remained constant at 19, while the number of representatives increased from 54 to 63. The Democrats increased the large majorities they held in both houses.
The 11th Arizona State Legislature, consisting of the Arizona State Senate and the Arizona House of Representatives, was constituted from January 1, 1933, to December 31, 1934, during Benjamin Baker Moeur's first term as Governor of Arizona, in Phoenix. The number in both houses remained constant, with 19 senators and 63 representatives. The Democrats held every seat in the Senate, and increased the large majority they held the house.
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 3rd Arizona State Legislature, consisting of the Arizona State Senate and the Arizona House of Representatives, was constituted from January 1, 1917, to December 31, 1918, during the first term of Thomas Edward Campbell, which was contested, and he left office after serving less than a year and the third 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 Republicans made modest gains in both houses, gaining 4 seats in both the Senate and the House, leaving Democrats with a 14–5 majority in the Senate and 31–4 majority in the House.
The 4th Arizona State Legislature, consisting of the Arizona State Senate and the Arizona House of Representatives, was constituted from January 1, 1919, to December 31, 1920, during the second term of Thomas Edward Campbell, as Governor of Arizona, in Phoenix. The Democrats maintained their 14-5 majority in the Senate, but the Republicans made gains in the house, reducing the Democrat lead to 26–9.
The 12th Arizona State Legislature, consisting of the Arizona State Senate and the Arizona House of Representatives, was constituted from January 1, 1935, to December 31, 1936, during Benjamin Baker Moeur's second term as Governor of Arizona, in Phoenix. The number of senators remained constant, while the number of representatives in the house decreased from 63 to 51. The Republicans broke the Democrats complete domination in the senate, managing to obtain a single seat, that of Apache County, however the house was entirely in Democratic hands.
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 16th Arizona State Legislature, consisting of the Arizona State Senate and the Arizona House of Representatives, was constituted in Phoenix from January 1, 1943, to December 31, 1944, during the second of Sidney Preston Osborn's four consecutive terms as Governor of Arizona. The number of senators remained constant at 19, while the house increased from 52 to 58 members. The Democrats controlled all 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 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 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 25th Arizona State Legislature, consisting of the Arizona State Senate and the Arizona House of Representatives, was constituted in Phoenix from January 1, 1961, to December 31, 1962, during the second 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 Republicans picked up three seats in the upper house, but the Democrats still had a 24–4 edge. In the House the Republicans picked up two seats, leaving the Democrats with a 52–28 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 37th Arizona State Legislature, consisting of the Arizona State Senate and the Arizona House of Representatives, was constituted in Phoenix from January 1, 1985, to December 31, 1986, during the second 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 composition of the senate remained constant, with the Republicans holding a 18–12, while the Democrats gained a seat in the lower house, decreasing the Republican majority to 38–22.
The 48th Arizona State Legislature, consisting of the Arizona State Senate and the Arizona House of Representatives, was constituted in Phoenix from January 1, 2007, to December 31, 2008, during the first two years of Janet Napolitano's second term in office. Both the Senate and the House membership remained constant at 30 and 60, respectively. The Democrats gained a seat in the Senate, leaving the Republicans with a 17-13 majority. The Republicans maintained their majority in the lower chamber, 33–27, even though the Democrats picked up 6 seats.
The 54th Arizona State Legislature, consisting of the Arizona State Senate and the Arizona House of Representatives, was constituted in Phoenix from January 1, 2019 to December 31, 2020, during the first two years of Doug Ducey's second full term in office. Both the Senate and the House membership remained constant at 30 and 60, respectively. Following the November 2018 election, Senate balance was unchanged, leaving the Republicans with a 17–13 majority. Republicans also maintained an 31–29 majority in the House after losing four seats to the Democrats.
