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.

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 Legislature met for two regular sessions at the State Capitol in Phoenix.

[1]: i [2]: i There were four Special Sessions, the first of which was convened on January 19, 2011, and adjourned on January 20;[3]: 2771  the second convened on February 14, 2011, and adjourned sine die on February 16;[3]: 2779  the third convened on February 14, 2011, and adjourned sine die February 16;[3]: 2991  and the fourth convened on November 11, 2011, and adjourned sine die later that same day.