Via the Le Sueur, Blue Earth and Minnesota rivers, it is part of the watershed of the Mississippi River.

[2][3] The Cobb River rises at the outlet of Freeborn Lake in northwestern Freeborn County and flows generally northwestwardly through northeastern Faribault, southwestern Waseca, and southwestern Blue Earth counties.

The Little Cobb flows generally westward 36.9 miles (59.4 km) to its confluence with the Big Cobb River.

[1] The Ziegler's Ford Bridge, built in 1904 over the Cobb River, is an example of the pin-connected Pratt through truss bridges once common in Minnesota, and one of the few built by a company based outside of Minneapolis–Saint Paul.

This article related to a river or creek in Minnesota is a stub.