California's 21st Senate district

California's 21st State Senate district
Current senator	Scott Wilk R–Santa Clarita
Population (2010)  • Voting age  • Citizen voting age	930,282 649,719 507,189
Demographics	39.99% White 11.73% Black 40.73% Latino 5.47% Asian 0.81% Native American 0.29% Hawaiian/Pacific Islander 0.33% other 0.65% remainder of multiracial
Registered voters	469,362
Registration	38.47% Democratic 33.76% Republican 21.85% No party preference

California's 21st State Senate district is one of 40 California State Senate districts. It is currently represented by Republican Scott Wilk of Santa Clarita.

The district encompasses northern Los Angeles County and parts of the High Desert. It includes the Antelope Valley, Victor Valley, and most of the Santa Clarita Valley.