1998 Arizona Senate election
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| All 30 seats of the Arizona Senate 16 seats needed for a majority | |||||||||||||||||||||||||
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| Results: Democratic gain Republican hold Democratic hold | |||||||||||||||||||||||||
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| Elections in Arizona | 
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The 1998 Arizona Senate election was held on November 3, 1998. 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 8, 1998.
Prior to the elections, the Republicans held a majority of 18 seats over the Democrats' 12 seats.
Following the election, Republicans maintained control of the chamber with 16 Republicans to 14 Democrats, a net gain of two seats for Democrats.
The newly elected senators served in the 44th Arizona State Legislature.