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Research Aids for McHenry County

We regret that we are unable to do any research for you.


County  Offices

The McHenry County Government Center
2200 N. Seminary Ave
hours-8:00 a.m. to 4:30 p.m., Monday through Friday.
(815) 338-2040

County Clerk  
Early Vital Record Indexes may be searched by the general public at the office of the County Clerk. 

    Marriage Record Indices:   Vol. I, 1837-1893 and Vol. II 1893-1908;     MCIGS index  is more complete than original, and is available for searching. Also see the online Marriage records at the   Illinois Statewide Marriage Index , you may find the marriage data you need, and be able to simply send for it.

    Death Record Index:   Vol. I- 1878-1905; Vol. II -1905-1916;  indexed by surname.  These records are not complete, as not all deaths were reported. ** After 1915, you must know the death date in order to obtain the record.*** Many Illinois death records are searchable online at: Illinois Online Death Index

    Birth Record Index: Vol. 1, 1877-1905; Vol. II 1905-1916.   indexed by surname.  These records not complete, as not all births were reported.

    Final Naturalization Records are available in the County Clerk's Office.     October 1859 to September 1906.  Declarations of Intent have been published by the MCIGS   and are available at the Crystal Lake Library.

Circuit Court Clerk's Office
    Probate Index
: 1836 to the present. Look in indexes to the probate records and the   wills filed. Use the  file number from  the index and place a request for the file. It will be   ordered  for you from another location, and will be available to you after noon the next day.   

County Recorder
    Indexes for the Deed Record Books, by Grantor or by Grantee; must have specific year.     Find the book number/letter, and the page number, then request the     microfiches from the deputy recorder.   

    Illinois Land records are searchable at the Illinois State Archives Database

Other Links

McHenry County Historical Society Museum
6422 Main St. in the village of Union.
The mailing address: P.O. Box 434, Union IL 60180.
Phone: (815) 923-2267.

    Some items that are unique to the museum library are files containing newspaper articles     pertaining to McHenry County towns; a biographical file of some of the county's past and     present citizens; some published family histories; an obituary file; property owner maps;     scrapbooks, diaries, Bible records, and many more items of general interest to anyone     doing research in McHenry County.


Library reference staff are often, but not always, willing to look up obits and other newspaper items if you have the date of the event! You would need to call or mail them to find out. ALWAYS reimburse them for time and copies!

Algonquin Area Library
   Branch library:  115 Eastgate Dr., Algonquin, IL 60102-3097 Phone:  (847) 658-4343
  Main Library:  2600 Harnish Road, Algonquin  Phone:  (847) 458-6060
Randall Vlcek, Administrative Librarian.
    (847) 658-4343 Fax: (847) 658-0179

Cary Area Public Library District
    1606 Three Oaks Road, Cary, IL 60013-1637
    Diane R. McNulty, Library Director.
    (847) 639-4210 Fax: (847) 639-8890

Crystal Lake Public Library
    Monday-Thursday from 9:00 a.m. to 9:00 p.m. Friday and Saturday 9:00
    a.m. to 5 p.m. and September through May it is open on Sundays, 2:00 to 5:00 p.m.
    Phone:(815) 459-1687.

Fox River Grove Public Library
    306 Lincoln Avenue
    Fox River Grove, IL 60021-1016
    Telephone:(847)639-2274  FAX:(847)639-0300

Johnsburg Public Library
    3000 W. Johnsburg Rd.
    Johnsburg, IL 60050
    (815) 344-0077

Huntley Area Public Library District
    11000 Ruth Road, PO Box 898, Huntley, IL 60142-0898
    Virginia Maravilla, Director.
    (847) 669-5386 Fax: (847) 669-5439

Marengo Public Library
    200 S. State St.
    Marengo, IL 60152
    Telephone: (815) 568-8236  Fax: (815) 568-5209

McHenry Public Library District
    809 N. Front St., McHenry, IL 60050-5528
    Arlene Kaspik, Executive Director.
    (815) 385-0036 Fax: (815) 385-7085

Nippersink Public Library District (Richmond)
    5418 Hill Rd.
    Richmond, IL 60071-9750
    Voice: 815-678-4014
    Fax: 815-678-4484

Woodstock Public Library
     414 W. Judd St.
     Woodstock, IL 60098
     Phone (815) 338-0542 Fax (815) 334-2296
     Night Owl Reference Service (815) 338-0542 until Midnight (for Woodstock Library Patrons)


The McHenry County Illinois Genealogical Society

The McHenry County Historical Society

The Crystal Lake Historical Society


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