New Horizons Genealogy

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New York Genealogy By County:

CountyDate FormedParent CountyCounty Seat
Albany County1683original countyAlbany
Allegany County1806GeneseeBelmont
Bronx County1914New YorkBronx
Broome County1806TiogaBinghamton
Cattaraugus County1808GeneseeLittle Valley
Cayuga County1799OnondagaAuburn
Charlotte County1772Albanyrenamed Washington in 1784
Chautauqua County1808GeneseeMayville
Chemung County1836TiogaElmira
Chenango County1798Herkimer, TiogaNorwich
Clinton County1788WashingtonPlattsburgh
Columbia County1786AlbanyHudson
Cortland County1808OnondagaCortland
Delaware County1797Ulster, OtsegoDelhi
Dutchess County1683original countyPoughkeepsie
Erie County1821NiagaraBuffalo
Essex County1799ClintonElizabethtown
Franklin County1808ClintonMalone
Fulton County1838MontgomeryJohnstown
Genesee County1802OntarioBatavia
Greene County1800Ulster, AlbanyCatskill
Hamilton County1816MontgomeryLake Pleasant
Herkimer County1791MontgomeryHerkimer
Jefferson County1805OneidaWatertown
Kings (Brooklyn) County1683Original countyBrooklyn
Lewis County1805OneidaLowville
Livingston County1821Genesee, OntarioGeneseo
Madison County1806ChenangoWampsville
Monroe County1821Genesee, OntarioRochester
Montgomery County1772Albany (as Tryon to 1784)Fonda
Nassau County1899QueensMineola
New York City (Manhattan) County1683Original countyNew York
Niagara County1808GeneseeLockport
Oneida County1798HerkimerUtica
Onondaga County1794HerkimerSyracuse
Ontario County1789MontgomeryCanandaigua
Orange County1683Original countyGoshen
Orleans County1824GeneseeAlbion
Oswego County1816Oneida, OnondagaOswego, Pulaski
Otsego County1791MontgomeryCooperstown
Putnam County1812DutchessCarmel
Queens County1683Original countyJamaica
Rensselaer County1791AlbanyTroy
Richmond (Staten Island) County1683Original countySt. George
Rockland County1798OrangeNew City
St. Lawrence County1802Clinton, Herkimer, MontgomeryCanton
Saratoga County1791AlbanyBallston Spa
Schenectady County1809AlbanySchenectady
Schoharie County1795Albany, OstegoSchoharie
Schuyler County1854Tompkins, Steuben, ChemungWatkins Glen
Seneca County1804CayugaOvid, Waterloo
Steuben County1796OntarioBath
Suffolk County1683Original countyRiverhead
Sullivan County1809UlsterMonticello
Tioga County1791MontgomeryOwego
Tompkins County1817Cayuga, SenecaIthaca
Tryon County1772Albany(renamed Montgomery 1784)
Ulster County1683Original countyKingston
Warren County1813WashingtonLake George
Washington County1772Albany (see Charlotte)Hudson Falls
Wayne County1823Ontario, SenecaLyons
Westchester County1683Original countyWhite Plains
Wyoming County1841GeneseeWarsaw
Yates County1823Ontario, SteubenPenn Yan


List of Obsolete New York New York Counties


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