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 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 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 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 14th Arizona State Legislature, consisting of the Arizona State Senate and the Arizona House of Representatives, was constituted in Phoenix from January 1, 1939, to December 31, 1940, during Robert Taylor Jones's first and only term as Governor of Arizona. The number of senators remained constant at 19, while the House increased from 51 to 52 members. The Democrats maintained one hundred percent of the senate seats, while the Republicans continued to have a single seat in the House, one of the two from Navajo County.
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 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 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 32nd Arizona State Legislature, consisting of the Arizona State Senate and the Arizona House of Representatives, was constituted in Phoenix from January 1, 1975, to December 31, 1976, during the first two years of Raúl Héctor Castro's single term as Governor of Arizona. Both the Senate and the House membership remained constant at 30 and 60, respectively. The Democrats reversed the margin of control in the upper house, gaining an 18–12 edge in the senate, while they also made inroads in the Republican's majority in the house, although the Republicans still controlled the lower body with a 33–27 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 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 52nd Arizona State Legislature, consisting of the Arizona State Senate and the Arizona House of Representatives, was constituted in Phoenix from January 1, 2015 to December 31, 2016, during the first two years of Doug Ducey's first full term in office. Both the Senate and the House membership remained constant at 30 and 60, respectively. Senate balance was unchanged, leaving the Republicans with a 17-13 majority. Republicans also maintained an unchanged 36–24 majority in the House. One senator switched party affiliation from Democrat to Republican in November 2015, boosting the Senate Republican majority to 18-12 for the second legislative session.
The 53rd Arizona State Legislature, consisting of the Arizona State Senate and the Arizona House of Representatives, was constituted in Phoenix from January 1, 2017 to December 31, 2018, during the second two years of Doug Ducey's first full term in office. Both the Senate and the House membership remained constant at 30 and 60, respectively. Democrats gained one seat in the Senate, leaving the Republicans with a 17-13 majority. Republicans also maintained an 35–25 majority in the House after losing one seat to the Democrats.
