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Mercer County, Illinois
Genealogy, History & Facts

Mercer County, Illinois Facts

Mercer County

When was Mercer County, IL Created?
Mercer County was established on January 13, 1825 from unorganized land. This county was named for Hugh Mercer (1726-1777), British officer in the Seven Years' War and general in the Continental Army during the American Revolutionary War.

What is the County Seat of Mercer County, IL?
The County Seat is located in Aledo (prior county seats was New Boston from 1835–1837, Millersburg from 1837–1847, Keithsburg from 1847–1857) also, the county government website is .

What counties are adjacent to Mercer County, IL?
Bordering Counties are  Rock Island County, Henry County, Knox County, Henderson County, Warren County, Des Moines County, Iowa, Louisa County, Iowa

What cities and towns are in Mercer County, IL?
Cities and towns located in the County include  Aledo, Alexis, Boden, Burgess, Cable, Eliza, Gilchrist, Hamlet, Joy, Keithsburg, Mannon, Marston, Matherville, Millersburg, New Boston, New Windsor, North Henderson, Norwood, Petersville, Preemption, Reynolds, Seaton, Shale City, Sherrard, Sugar Grove, Swedona, Viola, Wanlock, Windsor.

What Townships are in Mercer County, IL?
Townships located in the County include Keithsburg, Eliza, Greene, Abington, Duncan, Preemption, Perryton, Ohio Grove, North Henderson, Mercer, Millersburg, New Boston, Rivoli, Richland Grove, Suez.

Mercer County, IL Vital Records

Where can find Mercer County Birth, marriage, Divorce and Death Records?
Mercer 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 Mercer 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.

Mercer County, IL Census Records

What Mercer County, IL census records are available?
There are many types of census records for Mercer County guide you in researching your family tree. Federal Population Schedules are available for 1830, 1840, 1850, 1860, 1870, 1880 (free index), 1890 (fragment), 1900, 1910, 1920, 1930, 1940.

Mercer Co. Mortality Schedules can be found for 1850, 1860, 1870 and 1880. Mercer Co. Industry and Agriculture can be obtained for 1850, 1860, 1870 and 1880. Mercer 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

Mercer County, IL Courthouse and Government Records

Mercer County Courthouse

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

  • Mercer County Courthouse (all departments listed below are located here, unless otherwise noted)
    • Address: Aledo, IL 61321
  • Mercer 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.
    • Phone: (309) 582-7021
    • Marriage Records: 1835
    • Birth & Death Records: 1877
    • Land Records: 1834
  • Mercer 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: 309-582-7122
    • Probate Records: 1837
    • Court Records: 1836
  • Mercer 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

Mercer County, IL Societies and Family History Resources

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

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

What other genealogical resources are available in Mercer County, IL?
The following are web links to Genealogy, Records and Resources pertaining to Mercer 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.

Mercer Co. IL Maps, Atlases & Gazetteers

Mercer Co. IL Books, Newspapers & Publications

Mercer Co. IL Cemeteries & Church Records

Mercer Co. IL Family Websites, Pictures & Histories

Mercer Co. IL General and History Websites

Mercer Co. IL Military Records

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