United States
Time now in Contra Costa County
Sunday, 23 August 2026
Sunrise 06:30Sunset 07:51Time zone UTC −7
Time zone
America/Los_Angeles
UTC offset
UTC −7
Daylight saving
In effect now
Population
1,049,025
Sunrise
06:30
Sunset
07:51
Day length
13h 21m
Coordinates
37.92, -121.95
Time difference from Contra Costa County
Hours ahead (right) or behind (left) Contra Costa County right now.
Contra Costa County on the map
About the time in Contra Costa County
Contra Costa County sits at latitude 37.92, in the mid-latitude band, so day length here swings noticeably between midwinter and midsummer — today's 13h 21m is one point on that curve, not a fixed value.
Around 1,049,025 people live in Contra Costa County, and all of them keep the same civil time, so the reading above applies to the whole urban area — not just the city centre.
Contra Costa County runs on America/Los_Angeles, which puts the city UTC −7 from Coordinated Universal Time right now. The clock at the top of this page is not copied from your device: it is anchored to our reference timestamp and re-rendered every second against the IANA time zone database, so it stays right even when a laptop or phone has quietly drifted.
Frequently asked questions about time in Contra Costa County
- Which time zone is Contra Costa County in?
- Contra Costa County uses America/Los_Angeles, currently UTC −7.
- When do the sun rise and set in Contra Costa County today?
- Sunrise is at 06:30 and sunset at 07:51, giving 13h 21m of daylight.
- Is the clock on this page accurate?
- It is synchronised with our server rather than your device, then formatted for America/Los_Angeles, so a drifting device clock does not affect what you see.
- What time is it in Contra Costa County right now?
- The live clock above shows the current time in Contra Costa County, updating every second from America/Los_Angeles (UTC −7).
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