What County Is Walnut Creek, California In?
Walnut Creek is in Contra Costa County, California. About 70,088 people live there (2020–2024 estimate). It uses Pacific Time and covers 19.8 sq mi (51.2 km²) of land. The nearest larger city or town is Concord, 5.3 mi northeast.
- Population, 2020–2024 estimate
- 70,088 ± 67
- Land area
- 19.8 sq mi (51.2 km²)
- Time zone
- Pacific TimeUTC-08:00 in January; UTC-07:00 in July
- Sun today
- Sunrise and sunset for the year
- Elevation
- 201 ft 61 m, ground height at the central point
- Median household income
- $130,432 ± $8,895
- Median home value
- $1,057,300 ± $37,144
- Median rent, with utilities
- $2,680 ± $111
- Homes lived in by their owners
- 64.4% ± 1.8 points
- Metro area
- San Francisco-Oakland-Fremont, CAA principal city of the area
- Water area
- 0.01 sq mi (0.03 km²)
- State
- California
- Census place code
- 0683346
- Coordinates (central point)
- 37.902666, -122.040479
These coordinates mark a central point for the area, not a street address. Population, income, home value, rent and homes lived in by their owners: U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, ± margin at 90% confidence; checked on October 13, 2026.
County boundaries in Walnut Creek
For a point close to the city or county boundary, check the address with the office responsible for your form. Check a point on the county map.
Coordinates of Walnut Creek
37.902666, -122.040479 is a central point for Walnut Creek, not a street address. Convert these coordinates or share a map link.
Elevation in Walnut Creek
201 ft (61 m), the USGS ground height at Walnut Creek’s central point (3DEP terrain, 1/9 arc-second grid, NAVD 88). Ground height varies across town. Check elevation at another spot.
Sunrise and sunset in Walnut Creek
- Longest day
- 14 hours 47 minutes around June 21
- Shortest day
- 9 hours 32 minutes around December 21
- Earliest sunrise
- 5:45 AM around June 13
- Latest sunrise
- 7:38 AM the day before clocks go back in November
- Earliest sunset
- 4:48 PM around December 6
- Latest sunset
- 8:34 PM around June 28
Clocks go forward an hour on the second Sunday in March and back on the first Sunday in November, so sunrise and sunset jump an hour later in March and an hour earlier in November.
| Day | Sunrise | Sunset | Daylight |
|---|---|---|---|
| Jan 15 | 7:22 AM | 5:12 PM | 9 h 50 min |
| Feb 15 | 6:58 AM | 5:47 PM | 10 h 49 min |
| Mar 15 | 7:19 AM | 7:15 PM | 11 h 56 min |
| Apr 15 | 6:32 AM | 7:44 PM | 13 h 12 min |
| May 15 | 5:58 AM | 8:11 PM | 14 h 13 min |
| Jun 15 | 5:45 AM | 8:32 PM | 14 h 47 min |
| Jul 15 | 5:57 AM | 8:30 PM | 14 h 33 min |
| Aug 15 | 6:23 AM | 8:01 PM | 13 h 38 min |
| Sep 15 | 6:49 AM | 7:16 PM | 12 h 27 min |
| Oct 15 | 7:16 AM | 6:30 PM | 11 h 14 min |
| Nov 15 | 6:48 AM | 4:56 PM | 10 h 8 min |
| Dec 15 | 7:16 AM | 4:49 PM | 9 h 33 min |
Approximate times for a flat horizon at the central point; the days move by a day or so from year to year. Hills and weather can change what you see.
Time zones in Walnut Creek
Walnut Creek uses Pacific Time (America/Los_Angeles).
| Time zone | Local time and UTC offset | Next clock change |
|---|---|---|
| Pacific TimeAmerica/Los_Angeles | UTC-08:00 in January; UTC-07:00 in July. Enable JavaScript for the live clock. | Enable JavaScript for upcoming changes. |
Near a time-zone line, check where you are with the time-zone finder. Your phone’s setting can differ.
ZIP Code areas, largest first
- 9451827,345 people
- 9459827,206 people
- 9459623,417 people
- 9459723,129 people
- 9459516,988 people
- 9450714,586 people
6 ZIP Code areas overlap Walnut Creek. People counts are 2020–2024 estimates for each whole ZIP area. Mailing ZIPs can differ; check an address with USPS ZIP Code Lookup.
Bordering areas, nearest first
Distances are straight lines between map points.
- Shell Ridge, California (CDP)0.4 mi northeast
- San Miguel, Contra Costa County, California (CDP)1.1 mi south
- Contra Costa Centre, California (CDP)1.8 mi northwest
- Acalanes Ridge, California (CDP)2.1 mi west
- Castle Hill, California (CDP)2.2 mi southwest
- Saranap, California (CDP)2.2 mi southwest
- North Gate, California (CDP)2.3 mi east
- Alamo, California (CDP)3.6 mi southeast
- Pleasant Hill, California (city)4.0 mi northwest
- Reliez Valley, California (CDP)4.3 mi northwest
- Lafayette, California (city)4.4 mi west
- Concord, California (city)5.3 mi northeast
Before using this answer on a form
A city boundary, a CDP and a mailing city can mean different things.
Find the county where you are now, check its ZIP area, or check the time zone where you are.