Admitted to the Union on July 26, 1788 as the 11th state.
- 1790 – 1940 federal censuses extant for all counties except:
- 1810 federal census extant for all counties except Cortland and part of Broome.
- 1890 federal census lost for all counties except part of Suffolk (Brookhaven Township) and Westchester (Eastchester).
| Albany | Allegany | Bronx | Broome |
| Cattaraugus | Cayuga | Chautauqua | Chemung |
| Chenango | Clinton | Columbia | Cortland |
| Delaware | Dutchess | Erie | Essex |
| Franklin | Fulton | Genesee | Greene |
| Hamilton | Herkimer | Jefferson | Kings |
| Lewis | Livingston | Madison | Monroe |
| Montgomery | Nassau | New York City | Niagara |
| Oneida | Onondaga | Ontario | Orange |
| Orleans | Oswego | Otsego | Putnam |
| Queens | Rensselaer | Richmond | Rockland |
| St. Lawrence | Saratoga | Schenectady | Schoharie |
| Schuyler | Seneca | Steuben | Suffolk |
| Sullivan | Tioga | Tompkins | Ulster |
| Warren | Washington | Wayne | Westchester |
| Wyoming | Yates |