Early voting locations in Antioch, California for November 3, 2026
- WhenMon, Oct 5 – Mon, Nov 2Started · 18 days left
- Where6 sitesIn Contra Costa County · any site in the county
- Hours11:00AM-6:00PMMost sites; see each site
- Election DayTue, Nov 37:00 a.m. to 8:00 p.m.
Find sites near me Find by ZIP code Election office
Antioch is in Contra Costa County. Antioch has about 118,958 people, by the U.S. Census Bureau's 2025 estimate, which also gives its county lines. None of the 6 early voting sites Contra Costa County lists has a Antioch address; they are all on the Contra Costa County early voting page.
From the California Secretary of State's official list, checked October 14, 2026. Hours can change, so check before you go.
Antioch early voting sites (0)
Every early voting site in Contra Costa County (6) is on the Contra Costa County early voting page, with a ZIP code finder.
Contra Costa County elections office
Contra Costa County Elections Office
Office: 555 Escobar Street, Martinez, CA 94553
Mailing address: P.O. Box 271, Martinez, CA 94553
Phone: 925-335-7800
Regular office hours: 8 a.m. to 5 p.m.
California voting dates for Antioch voters
| Date | What |
|---|---|
| Mon, Oct 5 Ended | Ballots go out to all voters source |
| Mon, Oct 5 Started | Early voting opens source |
| Mon, Oct 19 | Last day to register source |
| Tue, Oct 27 | Last day to request a replacement ballot by mail source |
| Tue, Nov 3, 8:00 PM | Election Day: polls open 7:00 a.m. to 8:00 p.m. source |
| Tue, Nov 3, 8:00 PM | Register and vote the same day source |
| Tue, Nov 3, 8:00 PM | Return your ballot source |
Antioch voting questions
Where can I vote early in Antioch?
Contra Costa County lists 6 sites in all; see the Contra Costa County early voting page.
When does early voting start in Antioch?
Early voting in Antioch (Contra Costa County) started Monday, October 5, 2026 at the first sites to open. Some sites open later; each site's days are on this page.
When does early voting end in Antioch?
The last day of early voting in Antioch (Contra Costa County) is Monday, November 2, 2026. Election Day is Tuesday, November 3.
What are the early voting hours in Antioch?
Hours differ by site and day. The most common hours are 11:00AM-6:00PM. Check the site you plan to use before you go.
Who can vote early in Antioch?
Any registered voter in Antioch (Contra Costa County). In California you can vote at any early voting location in your county (vote centers in Voter’s Choice Act counties). Same-day voter registration is offered where marked.
What is the phone number of the election office for Antioch?
925-335-7800, the Contra Costa County Elections Office, 555 Escobar Street, Martinez, CA 94553.
Which county runs elections in Antioch?
Contra Costa County. Antioch voters register and vote with Contra Costa County.
More for Antioch voters
- California voting deadlines 2026: registration, mail ballots, early voting and Election Day.
- Contra Costa County early voting locations, every site in the county.
- Contra Costa County election office: address and phone.
- Who is on the California ballot, race by race.
- What's on my ballot and where do I vote, from your street address.
- Voting in every major U.S. city.
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Sites, days and hours are Contra Costa County's own, copied from its official list (named above); office details are from the California Secretary of State, County Elections Offices (checked October 14, 2026). Dates are California's, each linked to its source. Call the office before you go; city population and county lines are from the U.S. Census Bureau.