Welcome to the official website of
Jefferson County
New York
| District | Towns | Population | Reprenentative |
| 1 | Towns of Cape Vincent and Clayton | 7,535 | Robert W. Cantwell III |
| 2 | Towns of Lyme and Brownville | 8,141 | William W. Johnson |
| 3 | Towns of Alexandria, Orleans, and Leray | 7,359 | Philip N. Reed, Sr. |
| 4 | Towns of Antwerp, Philadelphia, Theresa, Leray(part), and Fort Drum (part) | 7,357 | Allen T. Drake |
| 5 | Town of Leray (part) and Fort Drum (part) | 9,639 | Michael Montigelli |
| 6 | Town of Wilna and Fort Drum (part) | 7,458 | Daniel R. McBride |
| 7 | Town of Champion and Fort Drum (part) | 7,780 | John D. Peck |
| 8 | Town of Leray (part), and Fort Drum (part) | 9,110 | James A. Nabywaniec |
| 9 | Towns of Hounsfield, Henderson, and Ellisburg | 8,071 | Patrick R. Jareo |
| 10 | Towns of Adams, Lorraine, Rodman, and Worth | 7,292 | Jeremiah J. Maxon |
| 11 | Towns of Rutland and Watertown | 8,951 | Robert D. Ferris |
| 12 | City of Watertown(South West Part) | 6,434 | Frances A. Calarco |
| 13 | City of Watertown (South East Part) | 6,621 | Scott A. Gray |
| 14 | City of Watertown(North East Part), All of Town of Pamelia | 8,050 | Corey Y. Grant |
| 15 | City of Watertown(North West Part) | 6,923 | Anthony J. Doldo |