California's 40th State Senate district

California's 40th State Senate district
Current senator	Ben Hueso D–San Diego
Population (2010)  • Voting age  • Citizen voting age	935,055 671,129 466,879
Demographics	16.39% White 7.27% Black 62.28% Latino 12.07% Asian 0.57% Native American 0.53% Hawaiian/Pacific Islander 0.19% other 0.70% remainder of multiracial
Registered voters	431,239
Registration	46.17% Democratic 19.62% Republican 29.94% No party preference

California's 40th State Senate district is one of 40 California State Senate districts. It is currently represented by Ben Hueso of San Diego.

The district runs along the entire border between California and Mexico. The heavily Latino district is a mix of urban San Diego neighborhoods in the west and rural Imperial County farmland in the east.