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List of towns,formation dates, and other details
| Caroline | |
| 1795 – 96 Settlers from Vermont and New Jersey | |
| 1811 Formed in Tioga County from the Town Spencer | |
| 1822 Transferred to Tompkins County | |
| 1839 Ceded land to Town of Danby | |
| Covert | |
| In Tompkins County 1817 - 1819 | |
| Danby | |
| 1797 Settled | |
| 1811 Formed in Tioga County from Town of Spencer | |
| 1822 Transferred to Tompkins County | |
| 1839 Annexed land from Town of Caroline | |
| 1856 Ceded land to Town of Dryden | |
| Division | |
| Name for Town of Groton 1817 – 1818 | |
| Dryden | |
| 1797 Settled | |
| 1803 Formed in Cayuga County from Town of Ulysses | |
| 1817 Transferred to new county of Tompkins | |
| 1856 Annexed land from Town of Danby | |
| Enfield | |
| 1821 Formed from Town of Ulysses | |
| Groton | |
| Settlers from Massachusetts and Connecticut in late 1700s | |
| 1817 Formed as Town of Division from Town of Locke, Cayuga County | |
| 1818 Named changed to Groton | |
| Hector | |
| In Tompkins County 1817 – 1854 | |
| Ithaca (city) | |
| 1888 Formed as a city from Village of Ithaca in Town of Ithaca | |
| Ithaca (town) | |
| Settlers from New York, Pennsylvania and New Jersey at The Flats | |
| 1821 Formed from Town of Ulysses | |
| 1888 Village of Ithaca became City of Ithaca | |
| Lansing | |
| 1792 Settlers from New Jersey | |
| 1817 Formed from Town of Genoa, Cayuga County | |
| Newfield | |
| 1811 Formed in Tioga County as Cayuga from Town of Spencer | |
| 1822 Transferred to Tompkins County; name changed to Newfield | |
| Ulysses | |
| 1792 Settled at Trumansbugh | |
| 1799 Formed as a town in Cayuga County | |
| 1803 Daughter town Dryden formed | |
| 1817 Transferred to new county of Tompkins | |
| 1821 Daughter towns Enfield and Ithaca formed | |
| 1817 Formed from Town of Genoa, Cayuga County | |