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List of towns, formation dates, and other details
| Duanesburg(h) | |
| 1765 Settlement began and formed as a district in Albany County | |
| 1788 Recognized as a town by State of New York | |
| 1809 Transferred to new county of Schenectady | |
| Glenville | |
| 1665 Settlement | |
| 1820 Formed from fourth ward of City of Schenectady | |
| Niskayuna | |
| 1640 Settled | |
| 1809 Formed from Town of Watervliet, Albany County | |
| 1853 Annexed land from City of Schenectady | |
| Princetown | |
| 1798 Formed in Albany County from City of Schenectady | |
| 1809 Transferred to new county of Schenectady | |
| Rotterdam | |
| 1661 Settled | |
| 1820 Formed from third ward of City of Schenectady | |
| 1853 Annexed land from the City of Schenectady | |
| 1903 Ceded land (Bellevue and Mont Pleasant) to City of Schenectady | |
| Schenectady (city) | |
| 1798 Incorporated as a city from the Town of Schenectady in Albany County; daughter town Princeton formed | |
| 1809 Transferred to new county of Schenectady | |
| 1820 Daughter towns Glenville and Rotterdam formed | |
| 1853 Land ceded to towns of Niskayuna and Rotterdam | |
| 1903 Annexed land from Town of Rotterdam (Bellevue and Mont Pleasant) | |
| Schenectady (town) | |
| c. 1661 Settled | |
| 1684 Patented in Albany County | |
| 1765 Chartered as a borough | |
| 1772 Incorporated as a district | |
| 1788 Recognized as a town by the State of New York | |
| 1798 Incorporated as a city in Albany County | |