Mercer County, Illinois Genealogy

From FamilySearch Wiki
Revision as of 23:38, 9 August 2011 by Dianekay (talk | contribs) (rearranging)

Jump to: navigation, search
Mercer County, Illinois
Boundary map of Mercer County, Illinois
Map of the U.S. highlighting Illinois
Location of Illinois in the U.S.
Founded: January 13, 1825
County Seat Aledo
Mercer County Courthouse.gif
Photo courtesy Illinois Regional Archives Depository, Illinois State Archives
Address Mercer County Courthouse
P.O. Box 66
Aledo, IL 61231
Mercer County Website

Template:Illinois-stubUnited States Gotoarrow.png Illinois Gotoarrow.png Mercer County

Mercer County Organization

                                     Beginning Dates for Mercer County Records
Birth Marriage Death Census Land Probate

County records are most often kept at the County Courthouse or another local repository. For further information about where the records for Mercer County are kept, see the Mercer County Courthouse page.

Historical Facts

Mercer County is named for Hugh Mercer who was a General of the Revolution and a close friend to George Washington. He died as a result of wounds received in battle during the Battle of Princeton. [1]

Parent County

  • 1825--Mercer County was created 13 January 1825 from unorganized territory and Pike County. County seat: Aledo [2]

Boundary Changes

See an interactive map of Mercer County boundary changes.

Record Loss

Places / Localities

Populated Places

Neighboring Counties

Records and Resources



Illinois cemetery records often identify birth, death, relationship, and military information, as well as religious affiliation.

  • Find A Grave can be searched by the name of a person or family to find where a person is buried.  Usually gives birth and death dates often with a picture of the tombstone.  May give obituaries, names of family members and links to their information in Find A Grave.


Historical populations
Census Pop.
IL Counties 1900-1990

1840 Pensioners

  • A Census of Pensioners for Revolutionary or Military Services: With their Names, Ages, and Places of Residence, as Returned by the Marshalls of the Several Judicial Districts, Under the Act for Taking the Sixth Census. Washington, D.C., 1841. FHL 973 X2pc 1840; FHL 2321; digital version at Google Books. [See Illinois, Mercer County on page 187.]

Church Records

Court Records

Ethnic Research

African American

The following have information concerning African American research.



Local Histories

  • History of Mercer and Henderson Counties Together with Biographical Matter, Statistics, Etc. Chicago, Illinois: H.H. Hill and Company, 1882. FHL fiche 6071026; digital versions at Ancestry ($), and Internet Archive (free)
  • Historical Encyclopedia of Illinois and History of Mercer County. Chicago: Munsell Pub. Co., 1903. Digital version at Ancestry ($).

Land and Property



  • Civil War
    Civil War service men from Mercer County served in various regiments. Men often joined a company (within a regiment) that originated in their county. Listed below are companies or regiments that were formed from men of Mercer County.
- 30th Regiment, Illinois Infantry, Companies A and G.
- 37th Regiment, Illinois Infantry, Company A.
- 45th Regiment, Illinois Infantry, Company I.
- 65th Regiment, Illinois Infantry (Scotch Regiment), Company B.
- 83rd Regiment, Illinois Infantry, Company D.
- 84th Regiment, Illinois Infantry, Company H.


Newspapers and Obituaries

  • ($) has historical newspapers online including Burlington, Iowa newspapers dating back to the mid 1800's that may have included Mercer County residents. This database is free at some libraries.


Mercer County Almshouse Registers Index, 1859-1948, courtesy: Illinois State Archives

Probate Records


County Courthouse

County records are most often kept at the County Courthouse or another local repository. For further information about where the records for Mercer County are kept, see the Mercer County Courthouse page.

Family History Library

Illinois Regional Archives Depository (IRAD)

Public Libraries

Social Groups Online


The Essley-Noble Museum located at 1406 SE 2nd Ave. in Aledo Illinois is a friendly and well staffed genealogy resource for those researching Mercer County.
They specialize in having an INDEXED cross-referenced obituary collection going back to the early publication dates for the local papers. They also have microfilms available for these papers. They just completed (2010) a project for all the cemeteries in the county which contains GPS locations, which is particularly useful when trying to locate the small and hidden cemeteries in the townships.
Their current project is collecting civil war veteran photos, biographies, histories from Illinois, specifically in Mercer County.
Although the genealogy section is in a corner of the Museum it is well worth the visit. The majority of the building is devoted to collections of period attire, house wares and other antiques.
Visit their web site at for current hours (the volunteers currently staff the facility three days a week) and other details. The mailing address is PO Box 269 Aledo, IL 81231,


Vital Records

Web Sites


  1. Hugh Mercer
  2. The Handybook for Genealogists: United States of America, 10th ed. (Draper, UT: Everton Publishers, 2002), 196. (FHL Collection Ref Book 973 D27e 2002). WorldCat entry.