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Genealogy Resources for Onondaga County, New York

Onondaga County was formed from part of Herkimer County in 1794. The County Seat is Syracuse. The Six Nations were founded at Onondaga abt. 1550 A.D..

Onondaga County encompasses approximately 780 square miles* in the State of New York.

New York

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These resources for the State of New York may contain resources for Onondaga County:

Free Genealogy Resources for this County
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Ancestors born here

Name
Branch
Birth Date
Town

Ancestors married here

Name
Branch
Date
Town

Ancestors who died here

Name
Branch
Date
Town

Ancestors buried here

Name
Branch
Town
Place

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State Capital: 

State Established:

Onondaga County

Albany

Jul 26, 1788

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