The 2016 Arizona Senate election was held on November 8, 2016. Voters elected members of the Arizona Senate in all 30 of the state's legislative districts to serve a two-year term. Primary elections were held on August 30, 2016.
Prior to the elections, the Republicans held a majority of 18 seats over the Democrats' 12 seats. Note that, following the 2014 Arizona Senate election, Republicans held only 17 seats; however, Senator Carlyle Begay switched parties during his term in office, which increased Republicans from 17 to 18 in the Arizona Senate by election day in 2016.
Following the election, Republicans maintained control of the chamber with 17 Republicans to 13 Democrats, a net gain of one seat for Democrats.
The newly elected senators served in the 53rd Arizona State Legislature.