Reviewed and updated October 9, 2026 by the SearchSystems.net editorial team. The arrest counts are the ones each agency reported to the FBI, as the FBI held them on October 8, 2026. The jail figures are from the Vera Institute of Justice's Incarceration Trends data. Every office link was opened and checked against the office's own site between September 23, 2026 and September 25, 2026.
Union City, California, in Alameda County, has about 66,000 residents (2024 Census Bureau estimate). Every warrant for Union City comes from a judge of the Superior Court of California, County of Alameda, is served by whichever agency finds the person, and is recorded in the court file of the case it was issued in. This guide says who issues and serves warrants here, where a person arrested on one is held, how to check for one and how one is cleared.
This guide covers who issues warrants, who serves warrants, after a warrant arrest, checking for a warrant, clearing a warrant, directory links and common questions.
Related guides: Union City public records, Alameda County warrants, Union City arrest records, Union City inmate search, Union City criminal records, Union City court records, California arrest records and California inmate search.
Who Issues Warrants in Union City
In California an arrest warrant is signed by a judge. For Union City that means the Superior Court of California, County of Alameda, which hears every civil, criminal, family, probate, traffic and juvenile case.
A bench warrant follows a missed court date in any of those courts. Whichever kind it is, the warrant is part of the file of the case it was issued in, and the Superior Court clerk keeps that file.
The court records page SearchSystems verified for the county is at eportal.alameda.courts.ca.gov/?q=node%2F388 (page title: Search | Alameda eCourt Public Portal), which answered when SearchSystems opened it on September 23, 2026.
California has no single public index of every trial court case; each court's records are looked up through that court.
Who Serves Warrants in Union City
The Alameda County Sheriff's Office and the agency that reports for Union City (filed by the FBI as Union City Police Department) serve warrants in and around Union City.
The FBI's agency list also places six state police units, three other agencies, one state agency and three campus police departments in Alameda County (the arrest records guide names each one); each serves warrants on its own ground.
The agency that serves a warrant from Alameda County is whichever one finds the person; a California warrant is valid across California.
Together, the 13 agencies in Alameda County with all twelve months of 2025 on file reported 14,194 arrests to the FBI that year; arrests on warrants are counted among them, not separately.
Each agency and what it reported is in Union City arrest records.
Where a Person Arrested on a Warrant from Union City Is Held
A person arrested on a warrant and kept in custody goes to the county jail, whichever agency made the arrest. The jail, run by the Alameda County Sheriff's Office, held about 1,450 people on an average day in 2025 by the Vera Institute of Justice's count and has a custody page SearchSystems verified at acgov.org/sheriff_app. The Union City inmate search guide covers the jail in full.
A person arrested in Union City on a warrant from another county is held at the same jail until that county takes custody.
How to Check for a Warrant in Union City
Whether a warrant is out from Union City shows in three places:
- The court file of the case, through the Superior Court clerk, since a warrant is recorded in the case it was issued in.
- The District Attorney, which can say whether charges were filed; a warrant on a complaint follows the filing.
- The custody page of the Alameda County Sheriff's Office at acgov.org/sheriff_app, which shows people already arrested and booked, not open warrants.
Not one of the Alameda County pages SearchSystems verified (the sheriff's, the court's, the prosecutor's and the records request page) is a list of open warrants, so a check means asking the court or the prosecutor about a case by name.
The statewide criminal history kept by the California Department of Justice is not open to the public in California, so it is not a route to a warrant check on someone else.
Clearing a Warrant from Union City
A warrant is recalled by the court that issued it, so clearing one from Union City starts with the Superior Court clerk: the case goes back on the calendar and the judge recalls the warrant when the person appears.
A lawyer can often arrange the appearance in advance. The District Attorney's page SearchSystems verified is at da.alamedacountyca.gov.
More Official Wanted and Warrant Pages for Alameda County
The SearchSystems directory, online since 1997, lists the official pages for Alameda County and California. These wanted and warrant pages from its Alameda County listing were opened again on October 2, 2026 and each one still answers:
- California's Most Wanted Fugitives (oag.ca.gov)
Frequently Asked Questions
Can I check for a warrant online in Union City?
Not from the Alameda County pages SearchSystems verified; none of them is a warrant list. The court file is the record of a warrant: ask the Superior Court clerk.
Who serves warrants in Union City?
The agency that reports for Union City inside the city and the Alameda County Sheriff's Office outside it, or whichever agency finds the person; a California warrant is valid anywhere in the state.
Where is a person arrested on a warrant in Union City held?
At the county jail, run by the Alameda County Sheriff's Office, if kept in custody.
How is a warrant from Union City cleared?
By appearing before the court that issued it; the judge recalls the warrant in court. The case is put back on the calendar through the Superior Court clerk.
Is this the official Union City website?
No. SearchSystems.net is an independent public records guide, online since 1997. It links to the official city, county, court and state offices described above and does not hold records, charge for them or take requests.