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 26, 2026.
Oswego, Illinois, in Kendall County, has about 39,000 residents (2024 Census Bureau estimate). Every warrant for Oswego comes from a judge of the Circuit Court of Kendall County, 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 and common questions.
Related guides: Oswego public records, Kendall County warrants, Oswego arrest records, Oswego inmate search, Oswego criminal records, Oswego court records, Illinois arrest records and Illinois inmate search.
Who Issues Warrants in Oswego
In Illinois an arrest warrant is signed by a judge. For Oswego that means the Circuit Court of Kendall County, 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 Circuit Clerk keeps that file.
For Kendall County, SearchSystems opened and checked the court records page for the county at kendallcountyil.gov/offices/circuit-clerk/online-court-records (page title: Online Court Records | Kendall County, IL), phone 630-553-4183, 807 W John St, Yorkville, IL 60560, which answered when SearchSystems opened it on September 23, 2026.
Illinois has no single public index of every trial court case; each court's records are looked up through that court.
Who Serves Warrants in Oswego
The Kendall County Sheriff's Office and the agency that reports for Oswego (filed by the FBI as Oswego Police Department) serve warrants in and around Oswego.
The Joliet Police Department, the Plainfield Police Department, the Sandwich Police Department and two more are each listed by the FBI across several counties including Kendall County, so their arrests are not broken out for Kendall County here.
The agency that serves a warrant from Kendall County is whichever one finds the person; an Illinois warrant is valid across Illinois.
Together, the five agencies in Kendall County with all twelve months of 2025 on file reported 1,135 arrests to the FBI that year; arrests on warrants are counted among them, not separately.
Each agency and what it reported is in Oswego arrest records.
Where a Person Arrested on a Warrant from Oswego 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 Kendall County Sheriff's Office, held about 140 people on an average day in 2021 by the Vera Institute of Justice's count and has a jail page SearchSystems verified at kendallcountyil.gov/offices/sheriff/corrections. The Oswego inmate search guide covers the jail in full.
A person arrested in Oswego on a warrant from another county is held at the same jail until that county takes custody.
How to Check for a Warrant in Oswego
The places to check for a warrant from Oswego:
- The court file of the case, through the Circuit Clerk at 630-553-4183, since a warrant is recorded in the case it was issued in.
- The State's Attorney, phone 630-553-4157, which can say whether charges were filed; a warrant on a complaint follows the filing.
Not one of the Kendall 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.
Clearing a Warrant from Oswego
A warrant is recalled by the court that issued it, so clearing one from Oswego starts with the Circuit Clerk at 630-553-4183: 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 State's Attorney's page SearchSystems verified is at kendallcountyil.gov/offices/state-s-attorney, phone 630-553-4157.
Frequently Asked Questions
Can I check for a warrant online in Oswego?
Not from the Kendall County pages SearchSystems verified; none of them is a warrant list. The court file is the record of a warrant: ask the Circuit Clerk at 630-553-4183.
Who serves warrants in Oswego?
The agency that reports for Oswego inside the city and the Kendall County Sheriff's Office outside it, or whichever agency finds the person; an Illinois warrant is valid anywhere in the state.
Where is a person arrested on a warrant in Oswego held?
At the county jail, run by the Kendall County Sheriff's Office, if kept in custody.
How is a warrant from Oswego 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 Circuit Clerk at 630-553-4183.
Is this the official Oswego 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.