2004 Arizona Senate election

The 2004 Arizona Senate election was held on November 2, 2004. 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 September 7, 2004.

Prior to the elections, the Republicans held a majority of 17 seats over the Democrats' 13 seats.

Following the election, Republicans maintained control of the chamber with 18 Republicans to 12 Democrats, a net gain of one seat for Republicans.

The newly elected senators served in the 47th Arizona State Legislature.

Democrats

 * 1) District 5: Jack A. Brown
 * 2) District 23: Pete Rios

Republicans

 * 1) District 3: Linda Binder
 * 2) District 10: Jim Weiers
 * 3) District 18: Mark Anderson

Republican

 * 1) District 20: Slade Mead