Search Peoria County Genealogy Records

Peoria County genealogy records go back to the mid-1800s and cover one of the most well-documented counties in central Illinois. The county clerk holds birth records from 1872 and marriage records from 1825, with free online genealogy indexes that make it easy to start a search from home. If you are tracing a family line through Peoria County, you can look up names, dates, and record details through the clerk office or the circuit court portal. The county also has strong ties to the IRAD system at Western Illinois University, where older government records are kept for free research.

Peoria County Clerk Genealogy Office

The Peoria County Clerk is the main source for genealogy records in Peoria County. Their office at 324 Main Street, Room 101, Peoria, IL 61602 holds birth records from 1872 and marriage records from 1825. That marriage collection is one of the oldest in central Illinois, and the early volumes can fill gaps that other counties simply can't. You can call the clerk at (309) 672-6059 to ask about a specific name or date range before you visit. Staff handle walk-in and mail requests during normal business hours.

What sets Peoria County apart is the free Genealogy Indexes page on the county website. This tool lets you search birth, death, and marriage indexes from your own home. Type in a last name and a rough date range, and the system pulls up matching entries. It is free to search. Once you find a match, you can order a copy from the clerk office by mail or in person. The index does not show full records, but it tells you if the record exists and what year it falls in.

The Peoria County Clerk website shows the genealogy indexes page below.

This free tool is one of the best county-level genealogy search options in Illinois. It covers a wide range of years and is simple to use.

Note: Peoria County fees are set to increase as of February 1, 2026, so check the clerk website for the latest amounts before ordering.

Peoria County Court Records for Genealogy

The Peoria County Circuit Court keeps case records that go beyond vital records. Probate files, divorce cases, civil suits, and criminal cases all sit in the circuit clerk archives. These records can help you fill in details about an ancestor that vital records alone won't show. A probate file might list heirs, property, and debts. A divorce case could name both spouses, children, and the grounds for the split. These are valuable for genealogy work.

Peoria County runs a free court case search portal where you can look up case information by name or case number. The portal covers a range of case types and years. It is free to search and does not need an account. If you find a case that matters to your research, you can request copies from the circuit clerk office in person or by mail. Court records in Illinois are generally public under the Freedom of Information Act (5 ILCS 140), though some files may have sealed portions.

Land records and deed indexes are another useful source at the county level. Deeds show when your ancestor bought or sold property in Peoria County. They list the buyer, seller, date, and a legal description of the land. Mortgage records add more detail. If your family owned land here, those records can pin down the years they lived in the area.

Peoria County Genealogy at IRAD

The Illinois Regional Archives Depository for Peoria County is at Western Illinois University in Macomb. You can call them at (309) 298-2716 to check what they hold for Peoria County. IRAD keeps older government records that the county no longer stores on site. That includes early birth and death records, naturalization papers, probate files, court case files, and voter registers. Research at IRAD is free. Photocopy fees are small. Mail and phone requests are accepted, but they limit each request to two names.

Under the Local Records Act (50 ILCS 205), county records in Illinois cannot be destroyed without a proper disposal certificate. This law is what keeps older records safe at the IRAD system instead of being thrown out. For Peoria County researchers, that means you can find records at Western Illinois University that are no longer at the courthouse. The IRAD holdings database at the Illinois State Archives website lets you search what is available before you visit.

Searching Peoria County Records

There are several paths to take when searching genealogy records in Peoria County. The online genealogy indexes on the county website are the fastest place to start. The court portal covers case records. IRAD at Western Illinois University holds the oldest material. Each source covers a different type of record, so using all three gives you the most complete picture of a family.

For in-person research, the Peoria County Clerk office at 324 Main Street is open during normal business hours. Staff can help you look up records and place orders. The Peoria Public Library also has a strong local history and genealogy collection on the lower level at 107 NE Monroe Street. Their collection includes newspapers on microfilm going back to 1837, obituary indexes, mortuary records, and Peoria City Cemetery records from 1842 to 1886. Call (309) 497-2000 for hours and access details.

The Vital Records Act (410 ILCS 535) sets the rules for who can get copies of vital records in Illinois. Birth records open for genealogy research after 75 years from the date of birth. Death records open after 20 years. Marriage records become available after 50 years. These thresholds apply to all Peoria County vital records held by the clerk. When you get a genealogy copy, it is stamped as uncertified and marked for genealogical use only.

State Resources for Peoria County

The Illinois Department of Public Health holds statewide birth and death records from 1916 forward. If the Peoria County Clerk does not have what you need, IDPH may have a copy. Mail requests to IDPH take about 12 weeks to process. Genealogical copies from the state cost $10 and must be sent by mail only. You cannot order genealogy copies online or through VitalChek.

The Illinois State Archives offers several free databases that cover Peoria County. The statewide marriage index runs from 1763 to 1900. The death index covers 1916 to 1950 and 1951 to 1972. Public domain land sale records go back to the earliest sales in the state. All of these are free to search online. In-person research at the Archives in Springfield is also free. Out-of-state requests cost $10 prepaid.

Cities in Peoria County

Peoria is the largest city in Peoria County and the only one over the 50,000 population mark. All cities in the county rely on the Peoria County Clerk for vital records.

Nearby Counties

These counties border Peoria County. If your ancestor lived near a county line, their records may be filed in one of these neighboring counties instead.