Welcome to McHenry County
Illinois History and Genealogy

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Formed in 1836 out of Cook and LaSalle counties, McHenry County is the sixth largest county, in terms of population, in the state of Illinois. It was named for Major William McHenry, an Indian fighter who died in Vandalia in 1835.
The County originally stretched all the way east to Lake Michigan, with the county seat centrally in McHenry, but in 1839, the eastern townships of the county were carved out to form Lake County
Its county seat is Woodstock, Illinois

Cities, Towns and Villages
Crystal Lake * Harvard * Marengo * McHenry * Woodstock (county seat)

Villages
Algonquin (mostly) * Barrington Hills (part) * Bull Valley * Cary * Fox Lake (part) * Fox River Grove (part) * Greenwood * Hebron * Holiday Hills * Huntley (part) * Island Lake (part) * Johnsburg * Lake in the Hills * Lakemoor (part) * Lakewood * McCullom Lake * Oakwood Hills * Port Barrington (part) * Prairie Grove * Richmond * Ringwood * Spring Grove * Trout Valley * Union * Wonder Lake

Census-designated Places
Chemung * Pistakee Highlands

Unincorporated Communities
Alden * Belden * Big Foot Prairie (part) * Burtons Bridge * Coral * Franklinville * Harmony * Hartland * Lake Killarney * Lawrence * Palm Beach (part) * Ridgefield * Riley * Silver Lake * Solon Mills

Township Map

McHenry County Data

Biographies

Births

Cemeteries

Census Records

Church Histories/Records

County Records

Death Records

Family Bibles and Records

History Topics

Marriages

Military Records

Miscellaneous Data

News Gleanings

Obituaries and Death Notices

Schools

Wills/Probate Records

Surnames

Research Help

Website Updates:

Dec 2023:  obits for REYNOLDS, DONNELLY

Aug 2023: Birth Notices: MILLER, ST. JOHN, WARREN, STEWART:
obit: JEWELL, CRANDALL
Sick list News: KERNS, JACOBS, BROWN, MCNETT, WILCOX, NEELON
Chemung Township History

July 2023: Marriage News:  COMPTON-GLYNCH, ZIMMERMAN-WENANS, MCDONALD-JOSLYN
Obits for HARDY, PENCE, AVERY, SANDMAN, HUNTINGTON

PREVIOUS UPDATES
 

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Surrounding Counties
* Walworth County, Wisconsin - north
* Kenosha County, Wisconsin - northeast
* Lake County - east
* Cook County - southeast
* Kane County - south
* DeKalb County - southwest
* Boone County - west

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