Major Watersheds

A watershed, also called a drainage basin, is an area of land that drains into a river or stream. The Susquehanna River watershed is known as the Susquehanna River Basin. The Basin is further divided into six subbasins, following the mainstem and three of its major tributaries, the West Branch Susquehanna, Juniata, and Chemung Rivers. Each stream in the Basin also has its own watershed. There are 88 major watersheds in the Basin that encompass the largest rivers draining directly into the Susquehanna River or its three main tributaries, with some exceptions in the Chenango and Tioga Rivers and Bald Eagle Creek Watersheds.

Largest Non-Mainstem Watersheds (sq. mi.)

  1. Chenango River - 1,609
  2. Tioga River - 1,384
  3. Sinnemahoning Creek - 1,034
  4. Pine Creek - 981
  5. Raystown Branch Juniata River - 962
  6. Bald Eagle Creek - 773
  7. Tioughnioga River - 764
  8. Cohocton River - 605
  9. Swatara Creek - 571
  10. Unadilla River - 562
Subbasin Maps


GIS Dataset Title Major Watersheds, Susquehanna River Basin
Dataset Description Polygon dataset that includes the major watersheds of the Susquehanna River Basin. This file was created by dissolving the wshed24K dataset into the major watersheds. The groupings were defined by the needs of the Susquehanna River Basin Commission (SRBC) and represent the SRBC's interpretation of major watersheds in the Susquehanna River Basin.
Date 2006
Scale 1:24,000
Agency SRBC
Download GIS Dataset PASDA - Major Watersheds
Metadata Major Watersheds, 2006