Oakley, California

Oakley population, 2020 to 2024

Oakley added 3,676 residents from July 2020 to July 2024, a change of +8.5%. In the latest year it moved by +1,182. Among 429 California places of 5,000 or more, that growth ranks 16th; the median place changed by -1.1%. The median place of 5,000+ in California has 37,056 people, so Oakley is 1.3 times that size.

Oakley covers 15.87 square miles of land and 0.31 of water, for 2,972 people per square mile of land. The median California place of 5,000+ has 3,725, so Oakley is less dense than the typical town.

What county Oakley is in

All of Oakley's residents live in Contra Costa County, which had 1,172,607 residents in 2024. Oakley holds 4.0% of the county's population. The shaded shape is on the map above; dots mark the eight nearest places.

ZIP codes in Oakley

1 ZIP Code Tabulation Area (ZCTA) overlaps Oakley by at least 10% of the ZCTA's or the city's land: 94561. 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 Oakley is

The Census internal point of Oakley is at 37.996100, -121.693600. Sacramento, the capital, is 41.6 miles NNE in a straight line. The nearest larger place is Brentwood, CA (66,286 people), 4.4 miles away. The nearest city of 100,000 or more is Antioch, CA, 5.7 miles away.

Daylight in Oakley

At 38.00° N, Oakley gets about 14 h 48 min of daylight around the June solstice and 9 h 32 min around the December solstice, a swing of 5 h 17 min. Figures are sunrise to sunset from the SunCalc model for June 21 and December 21, 2026.

Places near Oakley

The eight nearest incorporated places of 1,000+ in California, measured between internal points. The closest is Brentwood, 4.4 miles away, with 66,286 people.