General Law city
Incorporated: August 4, 1960
City Hall: 245 E Bonita Ave, San Dimas, California 91773
Population (2020 Census): 34,924 (Also see latest State Population Estimates and Earlier decennial Census Counts).
Population Under Age 18 (2020 Census): 19.2%
Population Density (2020 Census): 2,323.3 persons per square mile
Housing Units: 13,033
Persons Per Housing Unit: 2.7
Land Area: 15.03 square miles (38.93 square kilometers)
Water Area: 0.39 square miles (1.01 square kilometers)
Total Area: 15.42 square miles (39.94 square kilometers)
Geographic Coordinates (Latitude/Longitude): 34.107957 -117.808529
The San Jose Land Company laid out the town in 1886-1887 at a site formerly named Mud Springs. The town was renamed after Saint Dimas, the penitent thief crucified alongside Christ.
City in red below. Click on map for more detailed color map of county.