San Dimas, California

San Dimas population, 2020 to 2024

San Dimas lost 1,569 residents from July 2020 to July 2024, a change of -4.5%. In the latest year it moved by -111. Among 429 California places of 5,000 or more, that growth ranks 391st; the median place changed by -1.1%. The median place of 5,000+ in California has 37,056 people, so San Dimas is 90% of it.

San Dimas covers 15.03 square miles of land and 0.39 of water, for 2,211 people per square mile of land. The median California place of 5,000+ has 3,725, so San Dimas is less dense than the typical town.

What county San Dimas is in

All of San Dimas's residents live in Los Angeles County, which had 9,757,179 residents in 2024. San Dimas holds 0.3% of the county's population. The shaded shape is on the map above; dots mark the eight nearest places.

ZIP codes in San Dimas

1 ZIP Code Tabulation Area (ZCTA) overlaps San Dimas by at least 10% of the ZCTA's or the city's land: 91773. ZCTAs are Census approximations of USPS ZIP code delivery areas. The list comes from the 2020 ZCTA to place relationship file, so a city that annexed land after 2020 may reach into ZIP codes not listed here.

Where San Dimas is

The Census internal point of San Dimas is at 34.108000, -117.808500. Sacramento, the capital, is 370.6 miles NNW in a straight line. The nearest larger place is Glendora, CA (50,101 people), 3.4 miles away. The nearest city of 100,000 or more is Pomona, CA, 4.3 miles away.

Daylight in San Dimas

At 34.11° N, San Dimas gets about 14 h 26 min of daylight around the June solstice and 9 h 53 min around the December solstice, a swing of 4 h 33 min. Figures are sunrise to sunset from the SunCalc model for June 21 and December 21, 2026.

Places near San Dimas

The eight nearest incorporated places of 1,000+ in California, measured between internal points. The closest is La Verne, 2.4 miles away, with 30,192 people.