Where to Look in Illinois
The six most productive places to start a people search in Illinois. Each links directly to the official record source.
Official Illinois Sources
State-level databases and agency record portals.
Illinois Courts
Dockets, civil & criminal case filings, judgments.
Property & Tax Records
Deeds, assessor data, owner history, liens.
Inmates & Offenders
State prison rosters, sex offender registries, jails.
Vital Records
Birth, death, marriage, divorce — certified records.
Illinois FAQ
Laws, fees, turnaround, and common questions.
1About Illinois Public Records
Illinois is the sixth-most-populous state in the country, with about 12.5 million residents spread across 102 counties. The structure of Illinois public records is dominated by Cook County — home to Chicago and roughly 40% of the state's population — and a statewide e-filing system that has reshaped court access since 2018.
The framework starts with the Illinois Freedom of Information Act (5 ILCS 140), which gives the public a right of access to records held by state and local agencies. Court records, business filings, real-estate deeds, and inmate data each have their own dedicated portals, and most are searchable by name. The biggest practical hurdle is Cook County's scale: research that takes a few minutes elsewhere can require navigating multiple specialized systems.
2Best Starting Points
For most Illinois people-search work, start with three portals: the Illinois Secretary of State's Business Entity Search (for anyone who has owned or registered a business), the IDOC offender search (for criminal-history confirmation), and Re:SearchIL (for civil and criminal court filings).
If you know the county, drop straight to that county's Circuit Clerk and Recorder of Deeds for the most authoritative copies. Cook County in particular publishes assessment, deed, and case data on multiple separate sites — knowing which one to use saves time.
3Official State Sources
Three statewide systems handle most Illinois records research: the Illinois Courts e-services suite, the Illinois Department of Corrections, and the Illinois State Police Bureau of Identification.
https://www.illinoiscourts.gov/eservices/efileil/
The Illinois Supreme Court's statewide e-filing platform. eFiling is mandatory for civil cases in the Supreme, Appellate, and Circuit Courts.
What it's useful for: Understanding the modern court-records landscape and knowing where filings actually live.https://www.ilga.gov/Legislation/ILCS/Articles?ActID=85&ChapterID=2
Full text of Illinois FOIA, with definitions of public bodies, exemptions, and request procedures.
What it's useful for: Drafting a FOIA request that won't be denied on technicalities.https://apps.ilsos.gov/businessentitysearch/
Official database of corporations, LLCs, not-for-profits, limited partnerships, and other business entities registered in Illinois.
What it's useful for: Confirming registered agents, officers, business addresses, and entity status.4Court Records
Illinois court records have moved decisively online over the past several years. Civil filings in every county now flow through a single eFileIL pipeline, and the resulting documents are accessible via Re:SearchIL, a Tyler-hosted portal similar to the federal PACER system.
For routine name-based searches, however, many counties still rely on older systems. Judici covers around 80 mostly downstate counties with a single search box. Cook County publishes its own Circuit Court docket. The Illinois Appellate and Supreme Courts post opinions and dockets on the state judiciary site.
https://researchil.tylerhost.net/
Statewide repository of e-filed Illinois court documents, accessible to attorneys, parties, judges, and clerks.
What it's useful for: Pulling actual filed documents in modern (post-eFile) cases — closest IL equivalent to PACER.https://www.judici.com/
A long-running portal indexing case dockets and basic case data for roughly 80 of Illinois's 102 counties.
What it's useful for: Quick downstate name searches without needing court credentials.https://www.illinoiscourts.gov/
Official site of the Illinois Supreme Court with appellate dockets, opinions, and procedural rules.
What it's useful for: Researching appellate decisions and statewide judicial policies.5Property & Tax Records
Property records are recorded at the county level in Illinois — typically by the County Recorder of Deeds (or the County Clerk's recordings division) — and assessed by the County Assessor or Township Assessor. There is no single statewide portal, but Cook County and the collar counties (DuPage, Kane, Lake, McHenry, Will) all have well-developed online systems.
In Cook County, the Recorder of Deeds office was abolished and folded into the Cook County Clerk's Office in 2020. Deeds, mortgages, and liens are now searchable through the Clerk's recordings portal. Assessment data lives separately at the Cook County Assessor.
https://www.cookcountyassessor.com/
Property assessment data for every parcel in Cook County, searchable by address or PIN.
What it's useful for: Looking up assessed value, owner of record, exemptions, and recent sales for any Chicago-area property.https://www.cookcountyclerkil.gov/recordings
The Clerk's office now houses what was the Cook County Recorder of Deeds. Deeds, mortgages, and lien indexes are searchable here.
What it's useful for: Verifying current ownership, mortgage history, and recorded liens on Cook County properties.https://www.cookcountypropertyinfo.com/
Unified portal pulling together Assessor, Treasurer, Clerk, and Board of Review information for each Cook County parcel.
What it's useful for: A single-window view of taxes paid, assessment, exemptions, and any pending appeals.6Business & Licensing Records
Illinois business filings are administered by the Department of Business Services at the Secretary of State's office. The free online Business Entity Search returns the registered agent, principal office address, formation date, and standing of every active corporation, LLC, and limited partnership.
For professional licensing — doctors, nurses, contractors, real-estate agents, cosmetologists, and dozens of other regulated professions — the Illinois Department of Financial and Professional Regulation (IDFPR) maintains a separate license-lookup tool.
https://www.ilsos.gov/departments/business-services/business-searches.html
The Secretary of State's main business-search hub, with file detail reports and good-standing certificates.
What it's useful for: Verifying that a business is real and active before signing a contract or pursuing a claim.7Corrections & Inmates
The Illinois Department of Corrections (IDOC) operates the state prison system and publishes a free Individual in Custody Search. Records cover individuals currently in custody, on parole, and recent releases. For sex-offender registration, the Illinois State Police runs the statewide registry under the Sex Offender Registration Act.
For county-jail inmates, you'll need to check the Sheriff's website for the relevant county; there is no statewide jail-roster system, but Cook County, DuPage, and most populous counties publish daily booking lists.
https://idoc.illinois.gov/offender/inmatesearch.html
Free public search for current and recent IDOC inmates with name, IDOC number, sentence, and projected release.
What it's useful for: Confirming whether someone is currently incarcerated by the state and where they are housed.https://sor.isp.illinois.gov/
Official ISP-managed registry identifying persons convicted of qualifying sex offenses, searchable by name, address, and ZIP.
What it's useful for: Community safety checks and verifying registration compliance.https://vinelink.vineapps.com/state/IL/ENGLISH
Free, confidential service for tracking custody status and getting notifications when an offender's status changes.
What it's useful for: Crime victims and concerned parties who need automatic alerts about an offender's release or transfer.8Vital Records
The Illinois Department of Public Health (IDPH), Division of Vital Records, holds birth, death, marriage, and stillbirth records for the state. Birth records are restricted: only the registrant, parents, legal guardians, or authorized representatives can obtain a certified copy until the record reaches roughly 75 years old. Death records have shorter restrictions and become more broadly available 20 years after the date of death.
Marriage and divorce certificates are issued by the County Clerk of the county where the license was issued or the divorce was filed — IDPH only verifies that an event occurred. The Vital Records office in Springfield (925 E. Ridgely Ave.) accepts walk-ins between 10 a.m. and 3 p.m. weekdays.
https://dph.illinois.gov/topics-services/birth-death-other-records.html
The official Illinois vital-records portal with eligibility rules, fees, and instructions for ordering certified copies.
What it's useful for: Identity, estate, passport, and genealogy work where you need an authentic IL certificate.https://dph.illinois.gov/topics-services/birth-death-other-records/birth-records/obtain-birth-certificate.html
Direct ordering page with the Application for Search of Birth Record Files and current fees.
What it's useful for: Submitting a request when you (or someone you legally represent) need a certified IL birth certificate.9Voter Registration
Voter records in Illinois are held by the State Board of Elections and by each county clerk. The State Board's online tools let any resident verify their own registration, polling place, and recent ballot history. Bulk voter-registration lists are available to candidates, parties, and certain authorized researchers, but they are not a public search tool for casual lookups.
For people-search purposes, voter data confirms that someone has been registered at a particular address in a specific county — useful as an address-history breadcrumb when paired with court and property records.
https://elections.il.gov/
The state agency overseeing Illinois elections, voter registration, and campaign-finance disclosures.
What it's useful for: Verifying your own registration, locating the right county clerk, or accessing campaign-finance disclosures.10Archive, Genealogy & Obituary Resources
The Illinois State Archives, operated by the Secretary of State, is the long-term home for state and local government records that have permanent historical value. Holdings include early census-style records, militia rolls, naturalization indexes, and a Statewide Death Index for deaths before 1916.
For obituaries, public libraries — particularly the Chicago Public Library, Newberry Library, and county historical societies — maintain extensive newspaper microfilm archives. Many libraries also subscribe to GenealogyBank or Newspapers.com for member access.
https://www.ilsos.gov/departments/archives/genealogy.html
Free, indexed access to many of the State Archives' genealogy collections, including death indexes and early state records.
What it's useful for: Tracing IL ancestors and verifying family events that predate digitized vital records.11County & City Resources — Major Counties
Illinois's 102 counties vary enormously in scale. Cook County alone (Chicago metro) is larger than 28 entire U.S. states. The collar counties — DuPage, Kane, Lake, McHenry, and Will — each have several hundred thousand to over one million residents and run sophisticated online systems. Most rural downstate counties rely on Judici and the County Clerk for routine searches.
For people-search work in Cook, plan on using at least three different portals: Cook County Assessor (for property), Cook County Clerk (for deeds and elections), and the Cook County Circuit Court Clerk (for cases). DuPage and Lake County publish similar three-portal setups; smaller counties typically combine all three under the County Clerk.
12People Search Tips for Illinois
Always confirm county before searching. Illinois has 102 counties and many have similar-sounding names (Madison/Macoupin, Logan/Mason, Champaign/Christian). A search in the wrong county returns nothing — even when good records exist.
Check Re:SearchIL and Judici. They overlap but neither is exhaustive. Re:SearchIL has the post-eFile civil documents; Judici has older docket history that hasn't migrated yet.
For Cook County, treat each portal as a separate database. The Assessor, Clerk, and Circuit Court systems do not share a unified ID. Cross-reference using full name and date of birth where possible.
Use the IDOC search for any criminal-history confirmation. A name match in IDOC means the person served state prison time — a stronger signal than a docket entry, which only proves a charge was filed.
13Privacy & Legal Framework
Illinois public-records access flows from the Illinois Freedom of Information Act (5 ILCS 140), but several state-specific statutes restrict particular categories. Vital records are governed by the Vital Records Act, juvenile court records are sealed under the Juvenile Court Act, and certain mental-health records are confidential under the Mental Health and Developmental Disabilities Confidentiality Act.
For criminal background checks, Illinois enforces the Uniform Conviction Information Act (UCIA), administered by the Illinois State Police Bureau of Identification. Anyone can request a UCIA name-based criminal history. For employment, tenancy, or credit decisions, federal law (the FCRA) requires using a certified Consumer Reporting Agency — the IDOC and ISP databases are not FCRA-compliant by themselves.
https://isp.illinois.gov/BureauOfIdentification/BackgroundChecks
The Bureau of Identification's hub for UCIA name-based and fingerprint-based criminal-history requests.
What it's useful for: Pulling a verified IL criminal-conviction history for legal, personal, or licensing purposes.More Illinois Record Tools
Combine a people search with Illinois-specific record searches for a complete profile. These companion directories are already live on PublicRecordCenter.com:
Search People in Other States
Every state's public records system works differently. Click any state for its dedicated people-search directory.
Frequently Asked Questions — Illinois
Are Illinois public records free?
Many are — Re:SearchIL allows free document viewing for case parties, IDOC inmate searches and the SOS Business Entity Search are free, and the Cook County property portals are free. Certified vital records and UCIA criminal histories carry per-request fees.
How do I find someone in Illinois by name only?
Start with the Secretary of State's Business Entity Search (covers anyone who's registered a business), then IDOC for criminal-history confirmation, then Judici and Re:SearchIL for civil and criminal cases. For older or rural counties, you'll often need to drop into the County Circuit Clerk directly.
How do I look up Illinois court cases?
Use Re:SearchIL for modern e-filed documents and Judici for downstate county dockets. Cook County's Circuit Court runs its own portal for Cook-only filings. Always verify the county where the case was filed before searching.
Can I look up Illinois property owners for free?
Yes — the Cook County Assessor and most county-assessor sites are free. For deeds and mortgages, use the Cook County Clerk's recordings portal in Chicago, or the County Recorder of Deeds elsewhere in the state.
How do I find an Illinois inmate?
Use the IDOC Individual in Custody Search at idoc.illinois.gov/offender/inmatesearch.html for state prisoners. For county jail inmates, check the local Sheriff's roster directly — Cook, DuPage, Lake, and most populous counties publish booking lists.
Is the Illinois sex offender registry public?
Yes. The ISP-operated Sex Offender Registry at sor.isp.illinois.gov is free, public, and searchable by name, address, ZIP code, or county.
What law governs public records in Illinois?
The Illinois Freedom of Information Act (5 ILCS 140), enforced by the Public Access Counselor at the Attorney General's office. Specific record types — vital, juvenile, mental health — are governed by additional statutes.
Can I use Illinois public records for an employee background check?
Not directly. Federal law (FCRA) requires that employment background checks be performed by a certified Consumer Reporting Agency. The IDOC, ISP, and county records are useful as references, but a CRA is required for any adverse-action decision.