Connecticut County Resources

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This entry was originally written by Alice Eichholz, Ph.D., CG, in Red Book: American State, County, and Town Sources.

This article is part of
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the Connecticut Family History Research series.
History of Connecticut
Connecticut Vital Records
Census Records for Connecticut
Background Sources for Connecticut
Connecticut Maps
Connecticut Land Records
Connecticut Probate Records
Connecticut Court Records
Connecticut Tax Records
Connecticut Cemetery Records
Connecticut Church Records
Connecticut Military Records
Connecticut Periodicals, Newspapers, and Manuscript Collections
Connecticut Archives, Libraries, and Societies
Connecticut Immigration
Ethnic Groups of Connecticut
Connecticut County Resources
Connecticut Town Resources
Map of Connecticut

Counties were abolished officially in 1959, as their purpose had been chiefly to define county court districts. For genealogical research purposes, counties become necessary when using the federal census returns, since census returns are all cataloged by county. Connecticut’s original four counties had become eight counties by the time of the first federal census in 1790. Although some towns on the borders crossed county jurisdictions for different census enumerations, the most accurate indication of these changes can be found in William Thorndale and William Dollarhide, Map Guide to the U.S. Federal Censuses, 1790–1920 (Baltimore: Genealogical Publishing Co., 1987). This guide should be consulted when using census records. Each town’s present county is given in the Connecticut Town Resources section.

Map County Date Formed Parent County(ies)
B6 Fairfield 1666 original
E2 Hartford 1666 original
B2 Litchfield 1751 Fairfield/Hartford
F5 Middlesex 1785 Hartford/New Haven
D5 New Haven 1666 original
J5 New London 1666 original
G2 Tolland 1785 Windham
J2 Windham 1726 New London