Walnut Creek, California

Walnut Creek population, 2020 to 2024

Walnut Creek added 599 residents from July 2020 to July 2024, a change of +0.9%. In the latest year it moved by +1,011. Among 429 California places of 5,000 or more, that growth ranks 134th; the median place changed by -1.1%. The median place of 5,000+ in California has 37,056 people, so Walnut Creek is 1.9 times that size.

Walnut Creek covers 19.76 square miles of land, for 3,584 people per square mile of land. The median California place of 5,000+ has 3,725, so Walnut Creek is close to the typical town.

What county Walnut Creek is in

All of Walnut Creek's residents live in Contra Costa County, which had 1,172,607 residents in 2024. Walnut Creek holds 6.0% of the county's population. The shaded shape is on the map above; dots mark the eight nearest places.

ZIP codes in Walnut Creek

4 ZIP Code Tabulation Areas (ZCTAs) overlap Walnut Creek by at least 10% of the ZCTA's or the city's land: 94595, 94596, 94597, 94598. 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 Walnut Creek is

The Census internal point of Walnut Creek is at 37.902700, -122.040500. Sacramento, the capital, is 55.2 miles NNE in a straight line. The nearest larger place is Concord, CA (124,016 people), 5.2 miles away.

Daylight in Walnut Creek

At 37.90° N, Walnut Creek 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 16 min. Figures are sunrise to sunset from the SunCalc model for June 21 and December 21, 2026.

Places near Walnut Creek

The eight nearest incorporated places of 1,000+ in California, measured between internal points. The closest is Pleasant Hill, 4.0 miles away, with 34,169 people.