The 1990 California State Board of Equalization elections took place on November 6, 1990, to elect all four seats of the State Board of Equalization, with the primary election taking place on June 5, 1990.
The incumbent was Democrat William M. Bennett, who was elected in 1986. He was running for reelection.
The incumbent was Democrat Conway H. Collis, who was elected in 1986. He did not seek reelection.
The incumbent was Republican Ernest J. Dronenburg, Jr., who was elected in 1986. He ran for reelection.
The incumbent was Democrat Paul B. Carpenter, who was elected in 1986. Carpenter was convicted in 1990 on corruption charges, and was not allowed take the seat following the 1990 election. Republican Matt Fong was appointed in 1991 to the district 4 seat for the remainder of the term.