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List of towns, formation dates, and other details
| Catharine | |
| 1798 Formed in Tioga County from Town of Newtown (now Elmira) [ | |
| 1823 Daughter towns Catlin and Veteran formed (now Chemung County) | |
| 1836 Transferred to new county of Chemung | |
| 1854 Transferred to new county of Schuyler; ceded land to Town of Cayuta | |
| 1860 Daughter town Montour formed | |
| Cayuta | |
| 1801 Settled | |
| 1824 Formed in Tioga County from Town of Spencer | |
| 1854 Transferred to new county of Schuyler; annexed land from Town of Catharine; daughter town Van Etten formed in Chemung County | |
| Dix | |
| 1800 Settled | |
| 1835 Formed in Tioga County from Town of Catlin | |
| 1836 Transferred to new county of Chemung | |
| 1854 Transferred to new county of Schuyler | |
| 1869 Annexed land from Town of Hector | |
| Hector | |
| 1791 Settled | |
| 1802 Formed in Cayuga County from Town of Ovid [ | |
| 1804 Transferred to new county of Seneca | |
| 1817 Transferred to new county of Tompkins | |
| 1854 Transferred to new county of Schuyler | |
| 1869 Ceded land to towns of Dix and Reading | |
| Jersey | |
| Name for Town of Orange 1813–1836 | |
| Montour | |
| 1794 Settled near current Village of Montour Falls | |
| 1860 Formed from Town of Catharine | |
| Orange | |
| 1799 Settlers from Monterey | |
| 1813 Formed in Steuben County as Town of Jersey from Town of Wayne | |
| 1836 Name changed to Orange; daughter town Bradford formed | |
| 1854 Transferred to new county of Schuyler | |
| Reading | |
| 1806 Formed in Steuben County from Town of Frederickstown (now Wayne) | |
| 1824 Daughter town Starkey formed in Yates County | |
| 1854 Reading transferred to new county of Schuyler | |
| 1869 Annexed land from Town of Hector | |
| Tyrone | |
| 1800 Settled | |
| 1822 Formed in Steuben County from Town of Wayne | |
| 1854 Transferred to new county of Schuyler | |