New York County Maps: Interactive History & Complete List

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Map of New York Counties
Map of New York county boundaries and county seats

Maps of New York are a very helpful tool when it comes to family history research, especially if you live far away from where your ancestor was living.

Due to the fact that political borders in the United States have often changed over the years, historic maps are important in helping you uncover the precise location of your ancestor’s hometown, just what land they owned, exactly who his or her neighbors were, and much more besides.

Maps of New York are an exceptional source for getting started with your research, given that they give important information and facts quickly about boundaries, rivers, and state borders, and then present them in a clearly understandable format.

The 10 largest cities in New York are New York City, Buffalo, Rochester, Yonkers, Syracuse, Albany, New Rochelle, Mount Vernon, Schenectady, and Utica.

Learn more historical facts about New York counties here.

Interactive Map of New York County Formation History

AniMap Plus 3.0, with the permission of the Goldbug Company


List of Every New York County

Albany County

Established in 1683, Albany County is home to the state capital, Albany. It has a population of approximately 305,000.

Broome County

Founded in 1806, Broome County is located in the southern part of the state and has a population of about 191,000.

Cayuga County

Established in 1799, Cayuga County is situated in the Finger Lakes region and has around 76,000 residents.

Chautauqua County

Founded in 1808, Chautauqua County is located in western New York and has a population of approximately 126,000.

Chemung County

Established in 1836, Chemung County is located in the southern tier of the state and is home to about 83,000 people.

Chenango County

Chenango County was founded in 1798 and is located in central New York. It has a population of around 47,000.

Clinton County

Established in 1788, Clinton County is situated in the northeastern part of the state and has a population of approximately 81,000.

Columbia County

Founded in 1786, Columbia County is located in the Hudson Valley and has about 59,000 residents.

Cortland County

Established in 1808, Cortland County is situated in central New York and has a population of around 47,000.

Delaware County

Founded in 1797, Delaware County is located in the Catskill Mountains and is home to approximately 44,000.

Dutchess County

Dutchess County is located in the Hudson Valley and was established in 1683. It has a population of around 295,000.

Erie County

Erie County was founded in 1821, is located in western New York, and has a population of about 920,000.

Essex County

Established in 1799, Essex County is located in the northeastern part of the state and has a population of approximately 36,000.

Franklin County

Founded in 1808, Franklin County is situated in northern New York and is home to around 50,000 people.

Fulton County

Established in 1838, Fulton County is located in the central part of the state and has a population of about 53,000.

Genesee County

Founded in 1802, Genesee County is located in western New York and has a population of approximately 57,000.

Greene County

Greene County was established in 1800 and is located in the Catskill Mountains. It has around 47,000 residents.

Hamilton County

Founded in 1816, Hamilton County is located in the Adirondack Mountains and has a population of approximately 4,500.

Herkimer County

Established in 1791, Herkimer County is located in central New York and is home to about 61,000 people.

Jefferson County

Founded in 1805, Jefferson County is situated in northern New York and has a population of approximately 110,000.

Kings County (Brooklyn)

Established in 1683, Kings County is located in the New York City borough of Brooklyn and has a population of over 2.5 million.

Lewis County

Lewis County was founded in 1805 and is located in northern New York. It has a population of approximately 26,000.

Livingston County

Established in 1821, Livingston County is situated in western New York and has about 63,000 residents.

Madison County

Founded in 1806, Madison County is located in central New York and is home to approximately 71,000 people.

Monroe County

Monroe County is located in western New York and was established in 1821. It has a population of over 741,000.

Montgomery County

Founded in 1772, Montgomery County is located in the central part of the state and is home to around 49,000 people.

Nassau County

Established in 1899, Nassau County is located on Long Island and has a population of over 1.3 million.

New York County (Manhattan)

New York County is located in the New York City borough of Manhattan and was founded in 1683. It has a population of approximately 1.6 million.

Niagara County

Established in 1808, Niagara County is located in western New York and has a population of around 209,000.

Oneida County

Founded in 1798, Oneida County is located in central New York and has a population of over 229,000.

Onondaga County

Onondaga County was established in 1794 and is located in central New York. It has over 460,000 residents.

Ontario County

Founded in 1789, Ontario County is located in the Finger Lakes region and has a population of approximately 109,000.

Orange County

Established in 1683, Orange County is situated in the Hudson Valley and has a population of over 385,000.

Orleans County

Founded in 1824, Orleans County is located in western New York and is home to around 40,000 people.

Oswego County

Oswego County is located in northern New York and was established in 1816. It has a population of approximately 116,000.

Otsego County

Founded in 1791, Otsego County is located in central New York and has around 59,000 residents.

Putnam County

Established in 1812, Putnam County is located in the Hudson Valley and has a population of approximately 98,000.

Queens County

Queens County was founded in 1683 and is located in the New York City borough of Queens. It has a population of over 2.3 million.

Rensselaer County

Established in 1791, Rensselaer County is located in eastern New York and has a population of around 159,000.

Richmond County (Staten Island)

Founded in 1683, Richmond County is located in the New York City borough of Staten Island and has a population of approximately 476,000.

Rockland County

Established in 1798, Rockland County is situated in the Hudson Valley and has over 328,000 residents.

St. Lawrence County

St. Lawrence County is located in northern New York and was founded in 1802. It is home to approximately 107,000 people.

Saratoga County

Established in 1791, Saratoga County is located in eastern New York and has a population of around 245,000.

Schenectady County

Founded in 1809, Schenectady County is situated in eastern New York and has a population of approximately 156,000.

Schoharie County

Established in 1795, Schoharie County is located in eastern New York and has around 30,000 residents.

Schuyler County

Founded in 1854, Schuyler County is located in the Finger Lakes region and has a population of approximately 17,000.

Seneca County

Seneca County was established in 1804 and is located in the Finger Lakes region. It has a population of around 34,000.

Steuben County

Steuben County is located in western New York and was founded in 1796. It is home to approximately 95,000 people.

Suffolk County

Established in 1683, Suffolk County is located on Long Island and has around 1.4 million residents.

Sullivan County

Founded in 1809, Sullivan County is located in the Catskill Mountains and has a population of around 76,000.

Tioga County

Established in 1791, Tioga County is located in southern New York and has a population of about 48,000.

Tompkins County

Founded in 1817, Tompkins County is situated in central New York and is home to approximately 105,000 people.

Ulster County

Ulster County was established in 1683 and is located in the Hudson Valley. It has a population of around 179,000.

Warren County

Founded in 1813, Warren County is located in eastern New York and has approximately 64,000 residents.

Washington County

Established in 1772, Washington County is located in eastern New York and has a population of around 60,000.

Wayne County

Founded in 1823, Wayne County is located in western New York and has a population of approximately 91,000.

Westchester County

Westchester County is located in the Hudson Valley and was established in 1683. It has a population of over 970,000.

Wyoming County

Founded in 1841, Wyoming County is situated in western New York and is home to around 39,000 people.

Yates County

Established in 1823, Yates County is located in the Finger Lakes region and has around 24,000 residents.

Old Antique Atlases & Maps of New York

David Rumsey Historical Map Collection

New York Map Links

Caleb Pike
About the author

Caleb Pike is an avid hiker and nature lover, with a passion for exploring the great outdoors. He's a writer, photographer, and adventurer, always seeking new trails to blaze and peaks to conquer.