California's 37th senatorial district is one of 40 California State Senate districts. It is currently represented by of .
The district encompasses central Orange County, centered on the city of Irvine. The district contains a mix of near-coastal cities, suburban sprawl, and the Santa Ana Mountains.
Due to redistricting, the 37th district has been moved around different parts of the state. The current iteration resulted from the 2021 redistricting by the California Citizens Redistricting Commission.