California's 5th senatorial district is one of 40 California State Senate districts. It is currently represented by of .
The district is centered on northern Central Valley, containing San Joaquin County and the northeastern portion of Alameda County. It includes the communities of Livermore, Dublin, Pleasanton, and Sunol.
Due to redistricting, the 5th 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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