California's 40th State Assembly district

California's 40th State Assembly district
Current assemblymember	Marc Steinorth R–Rancho Cucamonga
Population (2010)  • Voting age  • Citizen voting age	462,470 333,685 277,508
Demographics	35.57% White 11.08% Black 42.34% Latino 8.95% Asian 0.65% Native American 0.37% Hawaiian/Pacific Islander 0.28% other 0.75% remainder of multiracial
Registered voters	229,591
Registration	40.31% Democratic 33.75% Republican 21.04% No party preference

California's 40th State Assembly district is one of 80 California State Assembly districts. It is currently represented by Republican Marc Steinorth of Rancho Cucamonga.

The district encompasses parts of the Inland Empire. This plurality-Latino district forms a semicircular arc stretching from Rancho Cucamonga to Redlands, surrounding the much more heavily-Latino 47th district on the west, north, and east.