Tributaries
From the mouth:
- (left) Becketts Run
- (right) Tiernan Ditch
- (left) Ely Run
- (left) Cedar Creek
- Cedarville Reservoir
- (left) Nettlehorst Ditch
- (left) Warner Ditch
- (right) Wittmer Ditch
- (right) Haifley Ditch
- (left) Swartz-Carnahan Ditch
- Dunton Lake
- (right) Boger Ditch
- (left) Metcalf Ditch
- (right) Walker Ditch
- (left) Dilley Ditch
- (left) Wade Ditch
- (left) Bear Creek
- (right) North Branch Hursey Ditch
- (right) Carper Ditch
- (left) South Branch Hursey Ditch
- (right) Swander Ditch
- (right) North Branch Hursey Ditch
- (right) Nancy Davis Ditch
- (left) Sol Shank Ditch
- (right) Weicht Ditch
- (left) Sebert Ditch
- (right) Varner Ditch
- (left) Hoodelmier Ditch
- (right) Melissa Ditch
- (left) Buck Creek
- (left) Smith Ditch
- (right) Mason Ditch
- (left) Metcalf Ditch
- (right) Harwood Ditch
- (left) Metcalf Ditch
- (left) Christoffel Ditch
- (right) Willow Run
- (right) Amaden Ditch
- (right) Greens Ditch
- (right) Foulks Ditch
- (left) Peter Grube Ditch
- (left) Big Run
- (right) Ayford Ditch
- (left) Walters Ditch
- (right) Streeter Ditch
- (right) Praul Ditch
- (right) Mary Metcalf Ditch
- (left) Teutsch Ditch
- (left) Donnell Ditch
- (right) King Ditch
- (right) John Smith Ditch
- (left) Haverstolk Ditch
- (right) Ayford Ditch
- (left) Russell Run
- (left) Fish Creek
- (right) Cornell Ditch
- (left) Hiram Sweet Ditch
- (right) Baker Ditch
- (left) Hamilton Lake
- Black Creek
- (left) Haughey Ditch
- (left) Lillian Metz Ditch
- (right) Burch Ditch
- Black Creek
- Ball Lake
- (left) Myers Ditch
- Perfect Lake
- (left) West Branch Fish Creek
- (left) Donald Nunkle Ditch
- (left) Bluff Run
- (left) Bear Creek
- (left) Tamarack Ditch
- (left) Eagle Creek
- (right) North Branch Eagle Creek
- (left) Nettle Creek
- Nettle Lake
- (right) Mill Stream Drain
- Nettle Lake
- (right) East Branch St. Joseph River (rises in southwest Adams Township, Hillsdale County, Michigan at 41°54′17″N 84°33′52″W / 41.90472°N 84.56444°W / 41.90472; -84.56444)
- (left) Clear Fork
- (left) Silver Creek
- Merry Lake
- (left) Laird Creek
- (right) Nile Ditch
- (left) Ransom Ditch
- (left) Bird Creek
- Bird Lake
- (left) Newton Drain
- (left) Dillon Drain
- (left) Anderson Drain
- (left) Goose Creek
- (left) Lake Number One
- Lake Number Two
- Pittsford Millpond
- (right) Otto Drain
- Deer Lake
- Twin Lake
- (left) West Branch St. Joseph River
- Lake Seneca
- (left) outflow from Lake La Su An
- (right) East Fork West Branch St. Joseph River (rises in northwest Cambria Township, Hillsdale County, Michigan at 41°51′53″N 84°40′34″W / 41.86472°N 84.67611°W / 41.86472; -84.67611)
- (left) Jonas Brown Drain
- (left) Carruthers Drain
- (right) outflow from Cub Lake
- Cambria Millpond
- (left) Cambria Drain
- (left) Meade Drain
- Bear Lake
- (left) Pike Lake
- Broom Lake
- Lake Wilson
- Bankers Lake
- (left) Pike Lake
- (left) West Fork West Branch St. Joseph River (rises from the outlfow of Rebeck Lake in northwest Camden Township, Hillsdale County, Michigan at 41°48′22″N 84°48′22″W / 41.80611°N 84.80611°W / 41.80611; -84.80611)
- (left) Joe Drain
- (left) Prouty Drain
- Rebeck Lake
- Mead Lake
- Turner Lake
- Mead Lake
- Lake Seneca
Read more about this topic: St. Joseph River (Maumee River)