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 1st Arizona State Legislature, consisting of the Arizona State Senate and the Arizona House of Representatives, was constituted from February 14, 1912 to December 31, 1914, during the first term of George Wylle Paul Hunt as Governor of Arizona, in Phoenix. The legislature was heavily skewed towards the Democrats, with their holding a 15–4 lead in the senate, and a 31–4 lead in the Arizona House of Representatives The number of senators and representatives was set by the State Constitution, with 9 counties being granted one Senator, while the other 5 were granted two. Representation in the house was also by county, apportioned by population, with each county being guaranteed a minimum of 1 Representation.
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 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 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 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 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 27th Arizona State Legislature, consisting of the Arizona State Senate and the Arizona House of Representatives, was constituted in Phoenix from January 1, 1965, to December 31, 1966, during Samuel Pearson Goddard Jr.'s only term 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 two seats in the Senate, giving them a 26–2 edge in the upper house, while the Republicans gained three seats in the House, trimming the Democrats majority to 45–35.
The 28th Arizona State Legislature, consisting of the Arizona State Senate and the Arizona House of Representatives, was constituted in Phoenix from January 1, 1967, to December 31, 1968, during Jack Williams' first term as Governor of Arizona. The make-up of both houses was changed drastically by the implementation of districts, rather than the old system of county representation. The fourteen counties were broken up into 8 districts. Four of the districts consisted of multiple counties, while the other four represented single counties. In addition, Districts Seven and Eight, representing Pima and Maricopa Counties respectively, were further broken down into sub-districts. District 7 had eight sub-districts, 7-A through 7-F, while District 8 had fifteen sub-districts, 8-A through 8-O. The number of senators increased to 30, with the balance of power shifting drastically. Where Democrats had held a 26–2 majority in the prior legislature, Republicans now held a slim 16-14 majority. While the number of senators increased, the number of representatives decreased from 80 to 60. Again, the balance of power shifted to the Republicans, who now held 33-27 majority in the lower house. It was the first time Arizona history where the Republicans won control of both houses of the legislature.
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 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 47th Arizona State Legislature, consisting of the Arizona State Senate and the Arizona House of Representatives, was constituted in Phoenix from January 1, 2005, to December 31, 2006, during the second two years of Janet Napolitano's first term in office. Both the Senate and the House membership remained constant at 30 and 60, respectively. The Republicans gained a seat in the Senate, giving them an 18-12 majority. The Republicans maintained their majority in the lower chamber, 39–21, while the Democrats picked up the sole seat held by an Independent.
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 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.
