California's 21st senatorial district is one of 40 California State Senate districts. It is currently represented by of .
The district encompasses all of Santa Barbara County and parts of San Luis Obispo and Ventura counties, stretching from Grover Beach in the north down along the Highway 101 corridor to include Santa Maria, Buellton, Solvang, Goleta, Santa Barbara, the Santa Clara River Valley, Oxnard, Port Hueneme and Camarillo on the southeastern border. It also includes four of the Channel Islands, though all are uninhabited.
San Luis Obispo County â 19.93%
Santa Barbara County â 100%
Ventura County â 61.78%
Due to redistricting, the 21st district has been moved around different parts of the state. The current iteration resulted from the 2021 redistricting by the California Citizens Redistricting Commission.
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