| Other County Resources |
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Click on the links below for book titles and history specific to that county.
From what or whom did the name of each county originate? Click here to find out.
| County | Date Formed |
Parent County | County Seat |
| Albany | 1683 | original county | Albany |
| Allegany | 1806 | Genesee | Belmont |
| Bronx | 1914 | New York | Bronx |
| Broome | 1806 | Tioga | Binghamton |
| Cattaraugus | 1808 | Genesee | Little Valley |
| Cayuga | 1799 | Onondaga | Auburn |
| Charlotte | 1772 | Albany | renamed Washington in 1784 |
| Chautauqua | 1808 | Genesee | Mayville |
| Chemung | 1798 | Tioga | Elmira |
| Chenango | 1798 | Herkimer, Tioga | Norwich |
| Clinton | 1788 | Washington | Plattsburgh |
| Columbia | 1786 | Albany | Hudson |
| Cortland | 1808 | Onondoga | Cortland |
| Delaware | 1797 | Ulster, Otsego | Delhi |
| Dutchess | 1683 | original county | Poughkeepsie |
| Erie | 1821 | Niagara | Buffalo |
| Essex | 1799 | Clinton | Elizabethtown |
| Franklin | 1808 | Clinton | Malone |
| Fulton | 1838 | Montgomery | Johnstown |
| Genesee | 1802 | Ontario | Batavia |
| Greene | 1800 | Ulster, Albany | Catskill |
| Hamilton | 1816 | Montgomery | Lake Pleasant |
| Herkimer | 1791 | Montgomery | Herkimer |
| Jefferson | 1805 | Oneida | Watertown |
| Kings
Brooklyn |
1683 | Original county | Brooklyn |
| Lewis | 1805 | Oneida | Lowville |
| Livingston | 1821 | Genesee, Ontario | Geneseo |
| Madison | 1806 | Chenango | Wampsville |
| Monroe | 1821 | Genesee, Ontario | Rochester |
| Montgomery | 1772 | Albany (as Tryon to 1784) | Fonda |
| Nassau | 1899 | Queens | Mineola |
| New York City (Manhattan) |
1683 | Original county | New York |
| Niagara | 1808 | Genesee | Lockport |
| Oneida | 1798 | Herkimer | Utica |
| Onondaga | 1794 | Herkimer | Syracuse |
| Ontario | 1789 | Montgomery | Canandaigua |
| Orange | 1683 | Original county | Goshen |
| Orleans | 1824 | Genesee | Albion |
| Oswego | 1816 | Oneida, Onondaga | Oswego, Pulaski |
| Otsego | 1791 | Montgomery | Cooperstown |
| Putnam | 1812 | Dutchess | Carmel |
| Queens | 1683 | Original county | Jamaica |
| Rensselaer | 1791 | Albany | Troy |
| Richmond Staten Island |
1683 | Original county | St. George |
| Rockland | 1798 | Orange | New City |
| St. Lawrence | 1802 | Clinton, Herkimer, Montgomery | Canton |
| Saratoga | 1791 | Albany | Ballston Spa |
| Schenectady | 1809 | Albany | Schenectady |
| Schoharie | 1795 | Albany, Ostego | Schoharie |
| Schuyler | 1854 | Tompkins, Steuben, Chemung | Watkins Glen |
| Seneca | 1804 | Cayuga | Ovid, Waterloo |
| Steuben | 1796 | Ontario | Bath |
| Suffolk | 1683 | Original county | Riverhead |
| Sullivan | 1809 | Ulster | Monticello |
| Tioga | 1791 | Montgomery | Owego |
| Tompkins | 1817 | Cayuga, Seneca | Ithaca |
| Tryon | 1772 | Albany | (renamed Montgomery 1784) |
| Ulster | 1683 | Original county | Kingston |
| Warren | 1813 | Washington | Lake George |
| Washington | 1772 | Albany (see Charlotte) | Hudson Falls |
| Wayne | 1823 | Ontario, Seneca | Lyons |
| Westchester | 1683 | Original county | White Plains |
| Wyoming | 1841 | Genesee | Warsaw |
| Yates | 1823 | Ontario, Steuben | Penn Yan |