Alameda County, California
Alameda County · Oakland is the seat · Sacramento is the capital of California · Berkeley is a city · Fremont is a city · the City of Alameda is a city · San Francisco is a different county
Oakland is the seat. Sacramento is the capital. Berkeley is a city, not the hall.
Alameda County, California, was created 25 March 1853 from Contra Costa and Santa Clara, and named for the Rancho Arroyo de la Alameda — cottonwoods, not the City of Alameda as the whole county. Oakland is the county seat. Sacramento is the capital of California. Oakland is not the capital. San Francisco is not the capital. Los Angeles is not the capital. Do not read this page as Autauga-with-a-bridge. Do not read this page as Pulaski-with-a-port. Prattville is Autauga. Little Rock is Pulaski. Neither is this oval.
Berkeley is a city — not the hall. Fremont is a city — not the hall. Hayward is a city — not the hall. Livermore is a city — not the hall. The City of Alameda is a municipality on the island — not the county government. Dublin, Pleasanton, San Leandro, Union City, Newark, Piedmont, Albany, and Emeryville are cities — not the hall. Castro Valley, Ashland, Cherryland, Fairview, San Lorenzo, and Sunol are unincorporated communities — remainder, not a second seat. San Francisco is a consolidated city and county — a different government, taught later.
This page is Side One for the place. The Sheriff’s job — East Bay remainder patrol and Santa Rita Jail this badge still holds in Dublin — is taught at Office of the Sheriff — Alameda County.
Five Supervisors at 1221 Oak. They do not sit as the State Assembly.
Alameda is a charter county. A five-member Board of Supervisors, elected by district, sits at the County Administration Building, 1221 Oak Street, Oakland, CA 94612 — chambers on the fifth floor, Clerk of the Board Suite 536. They fund roads, the Fallon courthouse campus, and the Sheriff’s budget. They do not hire the Sheriff. The people do. Oakland City Council is a city body. The California Legislature sits in Sacramento. San Francisco Board of Supervisors is a different county. None of those is this Board.
The René C. Davidson Courthouse lists at 1225 Fallon Street — 1934 hall by Lake Merritt. The Wiley W. Manuel Courthouse lists at 661 Washington Street. The East County Hall of Justice lists at 5151 Gleason Drive, Dublin. Do not invent one courthouse as the whole map. Confirm live at acgov.org and alameda.courts.ca.gov.
The Sheriff is a county officer (California Constitution Article XI; Government Code § 24000). This Sheriff is not on the 2026 gubernatorial table. Elections Code § 1300 (AB 759, 2022) moved sheriff and district attorney to the presidential primary. A sheriff elected in 2022 serves a six-year term; the next regular is the 2028 presidential primary. Alameda’s charter defers elective officers to general law — this is not a Los Angeles-style charter exception. Last regular 7 June 2022 (majority in the primary). Take office at noon on the first Monday after January 1 succeeding election (Gov. Code § 24200). The Governor is 2026. That is a different desk in Sacramento.
The Bay is water. Fremont is a city. San Francisco is a different county.
Interstate 880, Interstate 580, Interstate 680, and Interstate 238 meet on this map. The Oakland Estuary and the Bay are water, not a San Francisco badge. Lake Merritt is in Oakland. The Livermore Valley is east. The Altamont is a pass, not a second county. UC Berkeley is a campus — not this government. Contra Costa is north — Martinez is that hall. Santa Clara is south — San Jose is that hall. San Joaquin is east — Stockton is that hall. San Francisco is west across the water — a city and county, not this oval. Staff who paste a Golden Gate photograph onto Fallon Street, or treat Oakland as the capital, or file Berkeley as this county government, or rewrite this county as Autauga-with-a-bridge, are on the wrong county.
How an East Bay public finds Oak Street, Fallon, Lakeside, and Broder
Board of Supervisors: 1221 Oak Street, Oakland. René C. Davidson Courthouse / Sheriff Civil Section: 1225 Fallon Street (Civil Room 104). Sheriff Administration: 1401 Lakeside Drive, 12th Floor, Oakland, CA 94612 — (510) 272-6878. Santa Rita Jail: 5325 Broder Boulevard, Dublin, CA 94568 — (925) 551-6500. Glenn Dyer Detention Facility at 50 Sixth Street, Oakland, is closed — do not send a family there. Confirm live at alamedasheriff.gov and acgov.org. A student who only knows a Golden Gate postcard, or a Sacramento photograph as this county, or treats City Hall as Santa Rita, has not found this campus.
Santa Rita still jails. OPD does not. Glenn Dyer is closed.
Crime in unincorporated Alameda — Castro Valley, Ashland, Cherryland, Fairview, San Lorenzo, Sunol, and the remainder — is this Sheriff. Crime in Oakland is often Oakland Police. Crime in Berkeley is often Berkeley Police. Fremont, Hayward, Livermore, Alameda, San Leandro, Pleasanton, Union City, Newark, Piedmont, Albany, and Emeryville Police are city badges. Dublin Police Services is a Sheriff contract — still this office, not a second county. This Sheriff is not those municipal departments. OPD is a city badge. This Sheriff is the county. Santa Rita Jail at 5325 Broder Boulevard, Dublin, opened 1989; this Sheriff still holds it. Rated capacity on public listings has sat near 3,489. Glenn Dyer closed. Official doors did not show a separate county Department of Corrections taking this house — do not invent a jailer split.
CDCR is not this Sheriff. Federal facilities on this map are not this oval. CHP is a state badge. BART Police is a transit badge. UC Berkeley Police is a campus badge. Oakland International Airport police services list as this Sheriff’s contract — still this office, not OPD as the airport. Do not send a family looking for a county booking to OPD headquarters, to a closed Glenn Dyer door, to Martinez (Contra Costa), or to San Francisco County Jail.
Care without inventing the Golden Gate as this county
A peace order served in Castro Valley. A court-ordered transport from Broder Boulevard to Fallon Street without becoming OPD. Search and rescue in the Sunol hills. Do not invent a church. Do not invent the Golden Gate as this oval. Do not invent Sacramento as this hall.
What Alameda actually watches
Court calendar on Fallon and Washington. A wreck on I-880. Fog on the Estuary. Wind on the Altamont. High water toward the Bay. Fire in the East Bay hills. Coordination with OPD, Berkeley PD, Fremont PD, Hayward PD, CHP, and campus police without becoming those departments. Coordination with Contra Costa’s Sheriff or Santa Clara’s Sheriff is mutual aid between two offices, not a merger. The Bay is geography. The Golden Gate is San Francisco’s postcard. Neither is OPD as this oval.
Oakland civic snapshot (verify official sources)
- State: California · County: Alameda · Seat: Oakland · Capital of California: Sacramento
- Map: Oakland · Berkeley · Fremont · Hayward · Livermore · City of Alameda · Dublin · Castro Valley remainder · I-880 · I-580 · the Bay
- Not San Francisco (city and county) · Not the capital · Not OPD as this oval · Not Autauga-with-a-bridge
- Board: five Supervisors at 1221 Oak Street
- Sheriff clock: not 2026 · last regular 2022 · next regular 2028 presidential primary · six-year bridge from AB 759
- Jail: Santa Rita, 5325 Broder Boulevard, Dublin — this Sheriff still holds it · Glenn Dyer closed
Orientation adapted from the California Constitution Article XI, Elections Code § 1300, Government Code §§ 24000, 24200, 25304, and 26600, Alameda County official pages (acgov.org, alamedasheriff.gov, bos.alamedacountyca.gov), Alameda Superior Court locations, and the Secretary of State for education. The Sheriff of record is whatever those sources say today. Confirm HQ versus court versus jail, and OPD versus this badge, on official pages before you travel.
What Oakland is not, as this county
- Not the capital of California. Sacramento is.
- Not San Francisco. Not Los Angeles as this hall.
- Not Berkeley / Fremont / Hayward / Livermore / the City of Alameda as the county government.
- Not Oakland Police as this oval. Not CHP. Not BART Police. Not UC Berkeley Police.
- Not Glenn Dyer (closed). Not Contra Costa’s jail in Martinez.
- Not Autauga-with-a-bridge. Not Pulaski-with-a-port.
- Not the Governor (that desk is 2026 in Sacramento).
- Not a campaign flyer.