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.
Rock Island County, Illinois, has about 143,000 residents (2024 Census Bureau estimate). Its court cases are filed in the Circuit Court of Rock Island County, and the file of each case, kept by the Circuit Clerk, is the public record of it. This guide says which court hears what, where to look a case up and who keeps the files.
This guide covers the courts, the records page, criminal cases, kinds of files, directory links, cities and common questions.
Related guides: Rock Island County public records, Rock Island County arrest records, Rock Island County warrants, Rock Island County inmate search, Rock Island County criminal records, Illinois arrest records and Illinois inmate search.
The Courts That Hear Cases from Rock Island County
In Rock Island County, the Circuit Court of Rock Island County hears every civil, criminal, family, probate, traffic and juvenile case.
Divorces go to the Circuit Court's domestic relations division, and the file stays with the Circuit Clerk.
The Circuit Clerk keeps the files, and a copy of anything in a file comes from that office, under the court's own rules rather than the Illinois Freedom of Information Act.
Looking Up a Case from Rock Island County
For Rock Island County, SearchSystems opened and checked the court records page for the county at rockislandcountyil.gov/189/Circuit-Clerk (page title: Circuit Clerk | Rock Island County, IL), phone 309-558-3538, 1317 Third Ave, Rock Island, IL 61201, Monday through Friday 8 am to 4:30 pm, 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 court page SearchSystems verified is at illinoiscourts.gov.
What Reaches the Court from Rock Island County
Together, the seven agencies in Rock Island County with all twelve months of 2025 on file reported 3,019 arrests to the FBI that year; the State's Attorney decides which of those arrests become cases in the Circuit Court of Rock Island County.
The State's Attorney's page SearchSystems verified is at rockislandcountyil.gov/309/States-Attorney (page title: State's Attorney | Rock Island County, IL), phone 309-558-3240, 1504 Third Avenue Rock Island, IL 61201, Monday through Friday 8 am to 4:30 pm, which answered when SearchSystems opened it on September 23, 2026.
The Kinds of Court Files
Criminal cases, divorces, traffic tickets and evictions all end up as files of these courts, and the file is what the public sees of each.
The other Rock Island County guides take the kinds of file one at a time: Rock Island County criminal records, Rock Island County divorce records, Rock Island County traffic tickets, Rock Island County DUI and Rock Island County property records.
More Official Court Pages for Rock Island County
The SearchSystems directory, online since 1997, lists the official pages for Rock Island County and Illinois. These court pages from its Rock Island County listing were opened again on October 2, 2026 and each one still answers:
- Quick Links, Court Forms (rockislandcountyil.gov)
Cities in Rock Island County
Wherever in the county a case arises, it is filed in the Circuit Court of Rock Island County.
SearchSystems has a guide to the offices of these cities in Rock Island County, with the 2024 Census Bureau population:
- Moline (42,442)
- East Moline (20,995)
- Silvis (8,003)
Frequently Asked Questions
How do I look up a court case in Rock Island County?
The court records page SearchSystems verified for the county is at rockislandcountyil.gov/189/Circuit-Clerk, phone 309-558-3538.
Which court hears felonies in Rock Island County?
The Circuit Court of Rock Island County, which hears every civil, criminal, family, probate, traffic and juvenile case.
Who keeps the court records in Rock Island County?
The Circuit Clerk. Copies come from that office under the court's own rules.
Is there a statewide court case search in Illinois?
No. Each court's records are looked up through that court.
Is this the official Rock Island County website?
No. SearchSystems.net is an independent public records guide, online since 1997. It links to the official county, court and state offices described above and does not hold records, charge for them or take requests.