Search DeKalb County Genealogy

DeKalb County genealogy records go back to 1837, and the county offers a free online database that makes starting your search easy. The county seat is Sycamore, where the clerk holds vital records and the recorder keeps land files. You can search births, marriages, deaths, and naturalization records through the free DeKalb genealogy database from home. The county also has land records available online through a separate search tool. Older records that have left the clerk's office are held at the IRAD at Northern Illinois University, which is right in DeKalb. That makes in-person research here more convenient than most counties.

DeKalb County Free Genealogy Database

DeKalb County stands out because it offers a free genealogy database that lets you search births, marriages, deaths, and naturalization records going back to 1837. That date is before DeKalb County was even officially organized. The database is run at dekalbgenealogy.com and is open to anyone. No login or fee required. Just type in a name and search. Results show names, dates, and record types so you can narrow down what you need.

This free tool is one of the best starting points for DeKalb County genealogy. Most counties in Illinois do not offer this kind of searchable index online for free. The database covers a long time span and includes four types of records. Births and marriages are the most common searches, but the naturalization records are valuable too. If your ancestor became a citizen in DeKalb County, the database may show when that happened. You can then request the full document from the county office for more details like country of origin or ship name.

The DeKalb County free genealogy database at dekalbgenealogy.com lets you search births, marriages, deaths, and naturalizations from 1837.

The database gives you index-level results. That means names and dates but not full copies of certificates or documents. Once you find a match, contact the DeKalb County Clerk at 110 East Sycamore Street, Sycamore, IL 60178 to get the actual copy. The phone number is 815-895-7149. Under the Vital Records Act (410 ILCS 535), genealogy copies of birth records are available after 75 years, death records after 20 years, and marriage records after 50 years.

DeKalb County Land Records

The DeKalb County Recorder has land records available online at lrs.dekalbrecorder.com. You can search by name, date, and document type. Land records are useful for genealogy because they show when your ancestor owned property in DeKalb County. A deed names both the buyer and seller. It lists the date and the location of the land. Mortgage files add financial details.

The DeKalb County land records search at dekalbrecorder.com provides access to the recorder's document index.

Land records can help you trace movement in and out of DeKalb County. If your ancestor sold land in one county and bought in another, the deed dates tell you roughly when they moved. Plat maps from the 1800s name the owner of each section. These old maps are useful when you know an ancestor farmed in the county but you do not have an exact address. The Local Records Act (50 ILCS 205) requires counties to keep land records with long-term value. That is why DeKalb County deeds from the 1800s are still on file and searchable today.

DeKalb County Records at IRAD

The IRAD depository for DeKalb County is at Northern Illinois University, right in the city of DeKalb. This is convenient because the IRAD is in the same county as the records it stores. Most IRAD sites are in a different city, which means a longer trip. At NIU, you can research DeKalb County records at the Founders Memorial Library, Room 245B. Call (815) 753-1807 to check hours.

IRAD holds older DeKalb County government records. These include early vital records, court files, probate cases, naturalization papers, and local government documents that have been transferred for long-term storage. Research is free. Mail and phone requests are accepted but limited to two names per request. Use the IRAD holdings database to see what DeKalb County records are at NIU before you visit.

Note: The IRAD at NIU serves DeKalb County and 17 other northern Illinois counties including Kane, LaSalle, DuPage, and Will.

Searching DeKalb County Genealogy Records

You have several paths to search genealogy records in DeKalb County. The free online database at dekalbgenealogy.com covers births, deaths, marriages, and naturalizations. The recorder's land record search covers deeds and mortgages. The IRAD at NIU holds the oldest files. And the Illinois State Archives in Springfield has statewide indexes that include DeKalb County data.

The State Archives free online databases include the statewide marriage index from 1763 to 1900, death indexes for several periods, and public domain land sale records. If your ancestor bought land from the federal government in DeKalb County, the land sale database will show that transaction. These searches are all free. In-person research at the Archives is also free, and you can photograph documents at no charge.

For state-level records from 1916 forward, the Illinois Department of Public Health handles birth and death files. Genealogy copies cost $10 by mail and take about 12 weeks. You cannot order genealogy copies online. The Freedom of Information Act (5 ILCS 140) governs public records in general, but vital records follow their own rules under the Vital Records Act. The Counties Code (55 ILCS 5) outlines the duties of the county clerk as custodian of marriage, birth, and death records in DeKalb County.

Nearby Counties

DeKalb County borders several counties in northern Illinois. If you cannot find a record in DeKalb County, your ancestor may have filed in a neighboring county. Check the counties below, especially if the family lived near a county line.