2020 Arizona Senate election

The 2020 Arizona Senate elections was held on November 3, 2020, as part of the biennial 2020 United States elections. Arizona voters elected state senators in all of the state's 30 senate districts. State senators serve two-year terms in the Arizona Senate, with all of the seats up for election each cycle. The primary elections on August 4, 2020, determined which candidates appeared on the general election ballot.

Following the previous election in 2018, Republicans had control of the Arizona Senate with 17 seats to Democrats' 13 seats.

Closest races
Seats where the margin of victory was under 10%: • # State Senate district 28, 0.4% (gain)

• # State Senate district 20, 4.6%

• # State Senate district 17, 5.1%

• # State Senate district 6, 9.4%

Democrats

 * District 2: Andrea Dalessandro was term-limited and ran for the Arizona House of Representatives.
 * District 10: David Bradley retired.

Republicans

 * District 8: Frank Pratt retired to run for his old seat in the Arizona House of Representatives.
 * District 12: Eddie Farnsworth retired.
 * District 16: David Farnsworth retired.