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List of towns, formation dates, and other details
| Adams | |
| In Oneida County 1802–1805 | |
| Annsville | 1793 Settlers from New Jersey |
| 1823 Formed from towns of Camden, Florence, Lee, and Vienna | |
| 1867 Ceded land to Town of Vienna | |
| Augusta | |
| 1793 Settled | |
| 1798 Formed from Town of Whitestown | |
| 1802 Daughter town Vernon formed | |
| 1836 Daughter town Stockbridge formed in Madison County | |
| Ava | |
| 1798 Settled | |
| 1846 Formed from Town of Boonville | |
| Bengal | |
| Name for Town of Vienna 1808–1816 | |
| Boonville | |
| 1795 Settled | |
| 1805 Formed from Town of Leyden, Lewis County | |
| 1846 Daughter town Ava formed | |
| Bridgewater | |
| 1788 Settled at Farwells Hill | |
| 1797 Formed in Herkimer County from Town of Sangerfield | |
| 1798 Transferred to new county of Oneida | |
| Brownville | |
| In Oneida County 1802–1805 | |
| Camden | |
| Settled late 1700s | |
| 1799 Formed from Town of Mexico | |
| 1805 Daughter town Florence formed | |
| 1807 Daughter town Vienna formed | |
| 1823 Daughter town Annsville formed | |
| Champion | |
| In Oneida County 1800–1805 | |
| Constantia | |
| In Oneida County 1808–1816 | |
| Deerfield | |
| 1773 Settled | |
| 1798 Formed from Town of Schuyler, Herkimer County | |
| 1832 Daughter town Marcy formed | |
| Ellisburg(h) | |
| In Onieda County 1803-1805 | |
| Florence | |
| 1801 Settled | |
| 1805 Formed from Town of Camden | |
| 1823 Daughter town Annsville formed | |
| Floyd | |
| 1790 Settled | |
| 1796 Formed in Herkimer County from Town of Steuben | |
| 1798 Transferred to new county of Oneida | |
| Forestport | |
| 1869 Formed from Town of Remsen | |
| Harrisburg(h) | |
| In Onieda County 1803-1805 | |
| Harrison | |
| In Onieda County 1804-1805 | |
| Kirkland | |
| 1787 Settled by eight families | |
| 1827 Formed from Town of Paris | |
| 1829 Daughter town Marshall formed | |
| 1834 Ceded land to Town of New Hartford | |
| 1839 Annexed land from Town of Paris | |
| Lee | |
| 1790 Settled at Delta | |
| 1811 Formed from Town of Paris | |
| 1823 Daughter town Annsville formed | |
| Leyden | |
| In Oneida 1798-1805 | |
| Lowville | |
| In Oneida County 1800-1805 | |
| Malta | |
| In Oneida County 1804-1805 | |
| Marcy | |
| 1793 Settled | |
| 1832 Formed from Town of Kirkland | |
| Martinsburgh | |
| In Oneida County 1800-1805 | |
| New Hartford | |
| 1788 Settled | |
| 1827 Formed from Town of Whitestown | |
| 1834 Annexed land from Town of Kirkland | |
| New Haven | |
| In Onieda County 1813-1816 | |
| Orange | |
| Name for Town of Vienna 1807-1808 | |
| Paris | |
| 1789 Settled at Paris Hill | |
| 1792 Settled at Paris Hill | |
| 1795 Daughter towns Brookfield, Cazenovia, Hamilton, Sangerfield, and Sherburne formed | |
| 1798 Transferred to new county of Oneida | |
| 1827 Daughter town Kirkland formed | |
| 1839 Ceded land to Town of Kirkland | |
| Redfield | |
| In Onieda County 1800-1816 | |
| Remsen | |
| 1792 Settled | |
| 1798 Formed from Town of Norway, Herkimer County | |
| 1809 Annexed land from Town of Steuben | |
| 1869 Daughter town Forestport formed | |
| Richland | |
| In Oneida County 1807-1816 | |
| Rome (city) | |
| 1870 Town of Rome incorporated as a city | |
| Rome (town) 1796-1870 | |
| Pre-1755 Settled at the Carrying Place | |
| 1796 Formed in Herkimer County from Town of Steuben | |
| 1798 Transferred to new county of Oneida | |
| 1870 Town incorporated as a city | |
| Rutland | |
| In Oneida County 1802-1805 | |
| Sangerfield | |
| 1791 Settlers from Massachusetts | |
| 1795 Formed in Herkimer County from Town of Paris | |
| 1797 Daughter town Bridgewater formed | |
| 1798 Transferred to new county of Chenango | |
| 1804 Transferred to Oneida County | |
| Scriba | |
| In Oneida County 1811-1816 | |
| Sherrill (city) | |
| 1916 Incorporated as a city from Town of Vernon | |
| Steuben | |
| 1789 Settled | |
| 1792 Formed in Herkimer County from Town of Whitestown | |
| 1796 Daughter towns Floyd and Rome formed | |
| 1797 Daughter towns Leyden and Western formed | |
| 1798 Transferred to new county of Oneida | |
| 1809 Ceded land to Town Remsen | |
| Trenton | |
| 1793 Settled by Dutch | |
| 1797 Formed in Herkimer County from Town of Schuyler | |
| 1798 Transferred to new county of Oneida | |
| Turin | |
| In Oneida County 1800-1805 | |
| Utica (city) | |
| 1832 Incorporated as a city from Town of Utica | |
| 1891 Land annexed from Town of Deerfield | |
| 1916 Annexed southern end of Town of Deerfield | |
| Utica (town) 1817-1832 | |
| Formally part of Cosbys Manor; settled shortly after Revolution | |
| 1798 Incorporated as a village in Town of Whitestown | |
| 1817 Formed as town from Town of Whitestown | |
| 1832 Town incorporated as a city | |
| Vernon | |
| 1794-97 Settled | |
| 1802 Formed from towns of Westmoreland and Augusta | |
| 1836 Daughter town Stockbridge formed in Madison County | |
| 1916 Daughter City of Sherill formed | |
| Verona | |
| 1792 Settled | |
| 1802 Formed from Town of Westmoreland | |
| Vienna | |
| 1798 Settled | |
| 1807 Formed as Town of Orange from Town of Camden | |
| 1808 Name changed to Bengal | |
| 1816 Name changed to Vienna | |
| 1823 Daughter town Annsville formed | |
| 1867 Annexed land from Town of Annsville | |
| Volney | |
| In Oneida County 1806-1816 | |
| Watertown | |
| In Oneida County 1800-1805 | |
| Western | |
| 1789 Settled | |
| 1797 Formed in Herkimer County from Town of Steuben | |
| 1798 Transferred to new county of Oneida | |
| 1811 Daughter town Lee formed | |
| Westmoreland | |
| c. 1786 Settled | |
| 1792 Formed in Herkimer County from Town of Whitestown | |
| 1798 Transferred to new county of Oneida | |
| 1802 Daughter towns Verona and Vernon formed | |
| Whitestown | |
| 1784 Settled | |
| 1788 Formed as a town in Montgomery County | |
| 1791 Transferred to new county of Herkimer | |
| 1792 Daughter towns Mexico, Paris, Steuben, and Westmoreland formed | |
| 1795 Daughter town Cazenovia formed in Herkimer County | |
| 1798 Transferred to new county of Oneida; daughter town Augusta formed | |
| 1817 Daughter town Utica formed | |
| 1827 Daughter town New Hartford formed | |
| Williamstown | |
| In Oneida County 1804-1816 | |