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List of towns with formation dates, and other details
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Selected links to town websites, clerks, and historians
List of towns, formation dates, and other details
| Berlin | |
| 1806 Formed from towns of Peterburgh, Schodack, and Stephentown | |
| 1812 Daughter town Sand Lake formed | |
| Brunswick | |
| 1807 Formed from City of Troy | |
| 1814 Ceded land to City of Troy | |
| 1839 Annexed land from Town of Lansingburgh | |
| Clinton | |
| Name for Town of East Greenbush 1855–1858 | |
| East Greenbush | |
| 1855 Formed as Clinton from Town of Greenbush | |
| 1858 Name changed to East Greenbush | |
| 1902 Ceded land to City of Rensselaer | |
| Grafton | |
| 1807 Formed from Town of Petersburgh and City of Troy | |
| Greenbush 1792–1897 | |
| (see East Greenbush, North Greenbush and City of Rensselaer) | |
| 1792 Formed from district of Rensselaerwyck (see Albany County) | |
| 1795 Second act of incorporation | |
| 1812 Daughter town Sand Lake formed | |
| 1843 Annexed land from Town of Sand Lake | |
| 1855 Daughter towns Clinton (now East Greenbush) and North Greenbush formed leaving the Village of Greenbush coterminous with the town | |
| 1897 Incorporated as a city and name changed to Rensselaer | |
| Hoosick | |
| 1688 Hoosick Patent granted | |
| 1772 Formed as a district | |
| 1788 Recognized as a town in Albany County | |
| 1791 Transferred to new county of Rensselaer | |
| Lansingburgh 1807–1900 | |
| 1807 Formed from towns of Petersburgh and Troy | |
| 1819 Annexed land from Town of Schaghticoke | |
| 1836 Ceded land to City of Troy | |
| 1839 Ceded land to Town of Brunswick | |
| 1900 Town ceded to City of Troy | |
| Nassau | |
| 1806 Formed as Philipstown from towns of Petersburgh, Schodack, and | |
| Stephentown | |
| 1808 Name changed to Nassau | |
| North Greenbush | |
| 1855 Formed from Town of Greenbush | |
| 1902 Ceded Village of Bath to City of Rensselaer | |
| Petersburgh | |
| 1791 Formed from Town of Stephentown | |
| 1806 Daughter towns of Berlin and Philipstown (now Nassau) formed | |
| 1807 Daughter towns Grafton and Lansingburgh formed | |
| Philipstown | |
| Name for Town of Nassau 1806–1808 | |
| Pittstown | |
| 1650 Settlement commenced | |
| 1761 Became a township by patent in Albany County (part of Schaghticoke District) | |
| 1788 Recognized as town by State of New York | |
| 1791 Transferred to new county of Rensselaer | |
| Poestenkill | |
| 1848 Formed from Town of Sand Lake | |
| Rensselaer (city) | |
| 1897 Town and Village of Greenbush incorporated as City of Rensselaer [ | |
| 1902 Annexed Village of Bath, Town of North Greenbush, and western part of Town of East Greenbush | |
| Sand Lake | |
| 1812 Formed from towns of Berlin and Greenbush | |
| 1843 Ceded land to Town of Greenbush | |
| 1848 Daughter town Poestenkill formed | |
| Schaghticoke | |
| 1772 Formed as a district in Albany County | |
| 1788 Recognized as a town by State of New York | |
| 1791 Transferred to new county of Rensselaer | |
| 1819 Ceded land to Town of Lansingburgh | |
| Schodack | |
| 1795 Formed from Rensselaerwyck (see Albany County) | |
| 1806 Daughter towns Berlin and Philipstown (now Nassau) formed | |
| Stephentown | |
| 1784 Formed from Rensselaerwyck (see Albany County) | |
| 1788 Recognized as a town by State of New York | |
| 1791 Transferred to new county of Rensselaer; daughter town Petersburgh formed | |
| 1806 Daughter towns Berlin and Philipstown (now Nassau) formed | |
| Troy (town, then city) | |
| Settled pre-Revolution by Dutch; settlement known as Ashleys Ferry and Vanderheydens Ferry | |
| 1789 Name Troy adopted in Albany County | |
| 1791 Transferred to new county of Rensselaer; formed as a town from | |
| Rensselaerwyck, Albany County | |
| 1807 Daughter towns Brunswick, Grafton, and Lansingburgh formed | |
| 1814 Annexed land from Town of Brunswick | |
| 1816 City charter | |
| 1836 Ceded land to Town of Greenbush; annexed land from Town of Lansingburgh | |
| 1900 Annexed Town of Lansingburgh | |
Selected links to town websites, clerks, and historians
| Berlin | |
| Brunswick | |
| Castleton-on-Hudson | |
| East Greenbush | |
| East Nassau | |
| Grafton | |
| Hoosick | |
| Nassau (town) | |
| Nassau (village) | |
| North Greenbush | |
| Petersburgh | |
| Pittstown | |
| Poestenkill | |
| Rensselaer | |
| Sand Lake | |
| Shaghticoke (town) | |
| Shodack | |
| Stephentown | |
| Troy | |
| West Sand Lake |