| South Branch Grass River | |
| Subdivision Type1: | Country |
| Subdivision Name1: | United States |
| Subdivision Type2: | State |
| Subdivision Name2: | New York |
| Mouth: | Grass River |
| Mouth Location: | Clare, New York |
| Mouth Coordinates: | 44.38°N -75.075°W |
| Mouth Elevation: | 779feet |
| Basin Size: | 138sqmi |
The South Branch Grass River flows into the Grass River in Clare, New York. The South Branch Grass River and Middle Branch Grass River combine here and become Grass River.[1]
Right
Jocks Pond Outlet
Mink Brook
Dead Creek
Irish Brook
Twin Ponds Outlet
Second Brook
First Brook
Allen Pond Outlet
Allen Brook
Randall Brook
Colton Creek
Left
Burntbridge Outlet
Roaring Brook
Silver Brook
Cook Pond Outlet
Moosehead Pond Outlet
Bend Brook
Steep Bank Brook