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DeKalb County, Illinois
Genealogy, History & Facts

DeKalb County, Illinois Facts

DeKalb County

When was DeKalb County, IL Created?
DeKalb County was established on March 4, 1837 from Kane County. This county was named for Johann de Kalb (1721–1780), German soldier in the Continental Army who fought alongside Gilbert du Motier, marquis de Lafayette.

What is the County Seat of DeKalb County, IL?
The County Seat is located in Sycamore (prior county seats was Orange from 1837-1839, Coltonville from 1839-1840) also, the county government website is .

What counties are adjacent to DeKalb County, IL?
Bordering Counties are  Boone County, McHenry County, Kane County, Kendall County, LaSalle County, Lee County, Ogle County, Winnebago County

What cities and towns are in DeKalb County, IL?
Cities and towns located in the County include  Cortland, DeKalb, Genoa, Hinckley, Kingston, Kirkland, Lee, Malta, Maple Park, Sandwich, Shabbona, Somonauk, Sycamore, Waterman.

What Townships are in DeKalb County, IL?
Townships located in the County include Kingston, Genoa, Franklin, Afton, Clinton, Cortland, DeKalb, Pierce, Paw Paw, Mayfield, Malta, Milan, Squaw Grove, South Grove, Shabbona, Somonauk, Sandwich, Victor, Sycamore.

DeKalb County, IL Vital Records

Where can find DeKalb County Birth, marriage, Divorce and Death Records?
DeKalb County vital records can be found at the Illinois Department of Public Health has copies of birth, marriage, divorce and death records. There is a fee for each copy requested. Please refer to the information to the Statewide Vital Records in Illinois for current fees and application process.

You can search online for DeKalb County Birth, Marriage, Divorce or Death Records. You can also Order Electronically Online or can download an application for Illinois Birth CertificateMarriage CertificateDivorce CertificateDeath Certificate Applications to mail.

DeKalb County, IL Census Records

What DeKalb County, IL census records are available?
There are many types of census records for DeKalb County guide you in researching your family tree. Federal Population Schedules are available for 1840, 1850, 1860, 1870, 1880 (free index), 1890 (fragment), 1900, 1910, 1920, 1930, 1940.

DeKalb Co. Mortality Schedules can be found for 1850, 1860, 1870 and 1880. DeKalb Co. Industry and Agriculture can be obtained for 1850, 1860, 1870 and 1880. DeKalb Co. Union Veterans Schedules is available for 1890. One can find free online and printable census forms to help you with your research. See Also Illinois Census Records Research Guide

DeKalb County, IL Courthouse and Government Records

DeKalb County Courthouse

What genealogical records can I find in the DeKalb County Courthouse?
The below facts shows exactly what death, marriage, birth, property, wills, and court records are typically in DeKalb County. The years listed below are the first noted records with this county. See Also Illinois Corthouse Records Research Guide.

  • DeKalb County Courthouse (all departments listed below are located here, unless otherwise noted)
    • Address: 133 West State Street, Sycamore, IL 60178
  • DeKalb County Clerk & Recorder of Deeds maintains records and issues certificates of vital statistics (birth certificates, death certificates, and marriage certificates) for the entire County. The Recorder's duties are receiving, filing and maintaining all records related to real property in our county. These documents range from all types of conveyance deeds, mortgages, releases and assignments, property liens, as well as, assorted federal, state and local liens. The Recorder’s office is responsible for the recordation and storage of plats of subdivision, land surveys and monument records. Many other types of miscellaneous documents are recorded, such as; foreign birth certificates, foreign marriage licenses, and military discharge paperwork to name a few.
    • Address:County Administration Building, 110 E. Sycamore St., Sycamore, IL 60178
    • Phone: (815) 895-7149
    • Marriage Records: 1837
    • Birth & Death Records: 1877
    • Land Records: 1838
  • DeKalb County Clerk of the Circuit Court, commonly known as the Circuit Clerk, is the keeper of the files and records of the Circuit Court. The Circuit Clerk's Office retains documents some of which include criminal law, chancery, support, probate, adoption, ect....
    • Phone: (815) 895-7138
    • Probate Records: 1837
    • Court Records: 1838
  • DeKalb County Treasurer's Office is responsible for the statutory duties required as County Treasurer and as Ex-Officio County Collector of Real Estate Property Taxes and Drainage District Taxes for the entire county.
  • The county archives of the state of Illinois
  • Local Government Records Database - provides a listing of the local governmental records held by the Illinois Regional Archives Depository (IRAD) system
  • BLM Land Records

DeKalb County, IL Societies and Family History Resources

What genealogical and historical societies, archives, museums, associations and libraries are available for DeKalb County, IL?
A list of DeKalb County Historical  and Genealogical Societies, Libraries, Archives. See also list of Statewide Illinois Archives, Historical & Genealogical Societies.

Where can I connect with other DeKalb County, IL Researchers through message boards and forums?

What other genealogical resources are available in DeKalb County, IL?
The following are web links to Genealogy, Records and Resources pertaining to DeKalb County. These genealogy links fall into 3 categories: Commercial Sites, Private Sites or Organization Sites. Some have free access some require a cost. This is simply a collection that has been gathered or submitted. I do not recommend or promote one genealogy site over another.

DeKalb Co. IL Maps, Atlases & Gazetteers

DeKalb Co. IL Books, Newspapers & Publications

DeKalb Co. IL Court, Probate Land and Tax Records

DeKalb Co. IL Cemeteries & Church Records

DeKalb Co. IL Family Websites, Pictures & Histories

DeKalb Co. IL General and History Websites

DeKalb Co. IL Military Records

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