Onondaga Lake Watershed Map

The Onondaga Lake watershed covers 285 square miles in Onondaga and Cortland counties in central New York. For more information about Onondaga Lake, visit DEC's Onondaga Lake webpage.

Large map of the Onondaga Lake watershed. The watershed covers much of Onondaga County and extends into northern Cortland County.

Onondaga Lake watershed (image: CNYRPDB).