Reviewed and updated October 11, 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. Every office link was opened and checked against the office's own site between September 23, 2026 and October 11, 2026.
Quincy, Illinois, in Adams County, has about 39,000 residents (2024 Census Bureau estimate). In Illinois the public criminal record is the court file, kept by the Circuit Clerk; the statewide criminal history kept by the Illinois State Police is open to anyone who asks. This guide says where each record of a criminal case from Quincy is kept and how it is seen.
This guide covers the court file, the statewide record, local arrest records, the prosecutor, sex offender registry, records requests and common questions.
Related guides: Quincy public records, Adams County criminal records, Quincy arrest records, Quincy warrants, Quincy inmate search, Quincy court records, Illinois arrest records and Illinois inmate search.
Criminal Cases in the Circuit Court of Adams County
In Illinois the public criminal record is the court file. Criminal cases from Quincy are heard by the Circuit Court of Adams County, which hears every civil, criminal, family, probate, traffic and juvenile case, and the file of each case is kept by the Circuit Clerk.
For Adams County, SearchSystems opened and checked the court records page for the county at adamscountyil.gov/government/departments/circuit-clerk (page title: Circuit Clerk | Adams County, IL), phone 217-277-2100, 521 Vermont St Quincy, IL 62301, which answered when SearchSystems opened it on October 11, 2026.
Illinois has no single public index of every trial court case; each court's records are looked up through that court.
The Illinois Criminal History and Your Own Copy
Illinois is one of the states that lets anyone look up another person's statewide criminal history: conviction information is public under the Uniform Conviction Information Act, through the Illinois State Police. The result is the repository record, what agencies reported to the state, which is wider than one county's court index but can lag it.
To see your own record, the route is a name-based or fingerprint-based request to the Illinois State Police. The state page SearchSystems verified for it is at isp.illinois.gov/BureauOfIdentification/MyRecord.
Arrest Records Kept Locally in Quincy
The Adams County Sheriff's Office and the agency that reports for Quincy (filed by the FBI as Quincy Police Department) keep the arrest records in and around Quincy: the report and the booking record of each arrest stay with the agency that made it, separate from the court file and from the state repository.
The FBI's agency list also places one more agency in Adams County: John Wood Community College (campus police); it keeps the records of its own arrests.
Together, the two agencies in Adams County with all twelve months of 2025 on file reported 1,389 arrests to the FBI that year; how each case ended is in the court file, not in the arresting agency's.
The agencies and their counts, year by year, are in Quincy arrest records.
The State's Attorney for Adams County
Charges in Adams County are filed by the State's Attorney, which reviews the arrests of every agency in the county and brings the cases in the Circuit Court of Adams County.
The office's page SearchSystems verified is at adamscountyil.gov/government/departments/state-s-attorney (page title: State's Attorney | Adams County, IL), phone 217-277-2225, 507 Vermont St, Quincy, IL 62301, which answered when SearchSystems opened it on September 23, 2026.
The Sex Offender Registry for Quincy
Registered sex offenders living in Quincy are listed on the Illinois Sex Offender Registry, run by the Illinois State Police at illinois.gov. The registry is public and can be searched online.
Registration itself is done in person with the local agency where the registrant lives: the sheriff's office, or the city police in a city with its own department.
Asking an Agency in Adams County for a Record
An arrest report, a booking record or a local criminal history letter comes from the agency that holds it, not from the court.
Under the Illinois Freedom of Information Act a county office must answer a request within 5 business days, with one 5-day extension, and it may charge copying only after the first 50 pages. The county records request page SearchSystems verified is at adamscountyil.gov/government/departments/county-clerk/foia (page title: FOIA | Adams County, IL).
Frequently Asked Questions
Are criminal records public in Quincy?
The court files of criminal cases are public, and so is the statewide criminal history kept by the Illinois State Police: conviction information is public under the Uniform Conviction Information Act. The arrest report itself is released by the agency that made the arrest, under the Illinois Freedom of Information Act.
Can I search Quincy criminal cases online?
The court records page SearchSystems verified for the county is at adamscountyil.gov (page title: Circuit Clerk | Adams County, IL).
How do I get my own Illinois criminal history?
Through a name-based or fingerprint-based request to the Illinois State Police.
Who prosecutes crimes in Quincy?
The State's Attorney, reached at 217-277-2225, which files its cases in the Circuit Court of Adams County.
Is this the official Quincy 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.