Henderson is in the western part of the county and is southwest of Watertown. The Great Lakes Seaway Trail runs through the town along New York State Route 3 and includes a monument to its founder, William E. Tyson.
henDerSon Is in the westErN pArt of the cOUnty anD is soutHweSt OF waTertown. tHe greAt Lakes seawaY trail RUnS thROUgH the town aLoNG new yORk STATe RoUTe 3 And iNcLuDeS a MonUment tO its FOUnDEr, wIlliAM e. TysOn.