Ontario County Genealogy
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Ontario County Countywide Sources
1790-1940 U.S. Federal Census Records
1790-1940 U.S. Fed. Census Archives
1790-1940 United States Federal Census World Vital Records
1841 Cenus of Pensioners
1881-present New York Birth Certificates (order here) Archives
1881-present New York Death Certificates (order here) Archives
1881-present New York Marriage Certificates (order here) Archives
A history of Ontario County, New York, and its people
A history of Ontario county, New York, and its people (Volume 2) Cornell University Library
Abstracts of wills of Ontario County, New York : in the courthouse, Canadaigus [sic], N.Y., 1794-1834 Family History Library
Abstracts of wills of Ontario County, New York, 1848-1849-1850 : Volume 12 (XII) (Liber D) Family History Library
American Genealogical Biographical Index Databases World Vital Records
American Genealogical-Biographical Index (AGBI)
Assessment roll, 1813, 1816, 1818-1819, 1821-1822 Family History Library
BillionGraves Cemetery Records Index Family Search
Cemetery records, Ontario County, New York Family History Library
Declarations of intention, 1907-1956, and naturalization petitions, 1907-1955 Family History Library
Deed records, 1789-1904; index, 1789-1958 Family History Library
Estate inventory files, 1797-1822 Family History Library
Federal Land Patents Bureau of Land Management
Find A Grave Gravestone, Tombstone, and Memorial Photo Collection World Vital Records
Gazeteer and business directory of Ontario County, N.Y., for 1867-8 Cornell University Library
Gazetteer and business directory of Ontario County, N.Y. for 1867-8
Gazetteer and business directory of Ontario County, N.Y., for 1867-8 Family History Library
Guide to historical resources in Ontario County, New York, repositories Family History Library
History of Ontario Co., New York : with illustrations descriptive of its scenery, palatial residences, public buildings, fine blocks and important manufactories, from original sketches by artists of the highest ability Family History Library
History of Ontario County, New York : with illustrations and family sketches of some of the prominent men and families Family History Library
History of Ontario county, New York, and its people (Volume 1) Cornell University Library
Marriage records, 1908-1935 Family History Library
Naturalization records, 1803-1906 Family History Library
New York Births and Christenings, 1640-1962 Family Search
New York Deaths and Burials, 1795-1952 Family Search
New York Marriages, 1600-1784
New York Marriages, 1686-1980 Family Search
New York, County Marriages, 1908-1935 Family Search
Ontario Co., New York, census records, 1915, 1925 Family History Library
Ontario County Biographies and Sketches US Gen Net
Ontario County Cemeteries New York Gravestones
Ontario County Directory for 1870, Containing the Names of the Inhabitants of Canandaigua, Geneva, and Phelps, Together with a Business Directory of Ontario County Monroe Public Library
Ontario County Will Testators Index Sampubco
Ontario County, 1884-5 directory, containing the general directories of Canandaigua and Geneva, together with the Buiness Directories of all other villages in Ontario County Cornell University Library
Ontario County, N.Y. cemetery records Family History Library
Ontario County, New York land ownership maps, [18-?], [1815?], 1852 and 1859 Family History Library
Ontario County, New York, 1914 Farm Directory Distant Cousin
Probate records, 1795-1924 Family History Library
State census records, Ontario Co., New York, 1855, 1865, 1875, 1892 Family History Library
U.S. Federal Census 1790-1940 Family Search
United States Obituary Collection
United States, New England Naturalization Index, 1791-1906 Family Search
More Ontario County records are available on the statewide page