City
Antioch
Antioch is a city record. City or town offices may handle local rules inside their limits, while county offices still handle records, taxes, courts, and many services.
Starting point
Confirm the address is inside local limits first.
If the address is inside Antioch, city or town offices may handle local permits, code, and services. If it is outside limits, county routing may be the better first stop.
A mailing city is not always the same as city government jurisdiction.
2025 population
118,958
Land area
29.172 sq mi
Water area
0.769 sq mi
Directory notes
Local layers to keep on the same page.
Confirm city or town limits.
A mailing address can use a nearby place name. If the address is outside limits, county offices may handle permits, code, and land-use routes.
County still matters.
Contra Costa County can still matter for assessor, tax collector, recorder, court, public health, social service, and election records.
Some layers are separate.
Water, sewer, fire, school, utilities, coast, earthquake maps, wildfire zones, parks, and trails may point outside city hall.
County layer
County shown for Antioch
Practical notes
Office, map, permit, and paperwork notes for Antioch
Place note · Cars and driving · Reviewed July 6, 2026
Antioch BART is the end of the Yellow Line
Antioch Station is a Yellow Line terminal with parking, Tri Delta Transit connections, bike lockers, restrooms, and a train transfer pattern riders should know.
Place note · Home and property · Reviewed July 4, 2026
Antioch emergency prep starts with CWS and a home plan
Antioch residents can pair the Contra Costa Community Warning System with a simple household plan for weather, power, road, and evacuation days.
Place note · Home and property · Reviewed July 4, 2026
Antioch permits can start in the Civic Access portal
Antioch's Civic Access portal supports address or APN searches, building permits, planning permits, encroachment permits, inspection scheduling, invoice payments, and permit-service tasks.
Place note · Home and property · Reviewed July 4, 2026
Antioch service requests start on the SeeClickFix map
Antioch uses SeeClickFix for common local service requests, including potholes, graffiti, streetlights, and other neighborhood issues.
Place note · Home and property · Reviewed July 3, 2026
Antioch water service questions start with Customer Service
Antioch water service has online payment options, stop-service access, billing contacts, payment arrangement help, and address-change support through Customer Service.
County layer · Outdoors · Reviewed July 6, 2026
Concord picnic sites need the right reservation
Concord park picnics can be casual or reserved, but group sites, alcohol permits, inflatables, deposits, and special-event needs change the plan.
Almanac notes
Stories and local context near Antioch
Place note · History and culture
El Campanil Theatre keeps Antioch's Rivertown stage alive
El Campanil Theatre opened in downtown Antioch in 1928 and now works as a restored cultural venue in the Rivertown district.
Place note · History and culture
Antioch began as a river landing before it grew south
Antioch's early story starts near the San Joaquin River, where settlers chose the name in 1851 and river travel shaped the town before roads took over.
Place note · Outdoors
Antioch has coal-country trails and a protected dunes story
Black Diamond Mines is a large East Bay park near Antioch, while Antioch Dunes National Wildlife Refuge protects rare habitat that is mostly for learning, not wandering.
County layer · History and culture
Brentwood's local history museum keeps East County farm memory close
East Contra Costa Historical Museum in Brentwood gives the growing city a place for farm, school, family, and small-town history from the wider East County area.
County layer · History and culture
Richmond's old Carnegie library now holds city history
The Richmond Museum of History and Culture sits in the old Carnegie Library and connects Ohlone history, early city growth, and the WWII Homefront.
County layer · History and culture
Forest Home Farms keeps San Ramon's farm past in town
Forest Home Farms gives San Ramon a 16-acre historic farm, with Boone family buildings, old outbuildings, a walnut-processing past, and valley agriculture still visible.
County layer · History and culture
Pittsburg's name changed with the work on the waterfront
Pittsburg's history includes Rancho Los Medanos, fishing and canning, Black Diamond coal, waterfront shipping, industry, and Camp Stoneman.
County layer · History and culture
Clayton's town story starts with Joel Clayton in Diablo Valley
Clayton was laid out in 1857 by Joel Clayton as a small Diablo Valley center for nearby mining, ranching, farming, and local trade.