The Baraboo River // is a tributary of the Wisconsin River, about 70 mi (115 km) long, in south-central Wisconsin in the United States. Via the Wisconsin River, it is part of the watershed of the Mississippi River.
The Baraboo River was probably named after a French settler in the area, Jean Baribault, although it may also be a corruption of a French word or phrase.
The Baraboo River rises in southeastern Monroe County and flows generally southeastwardly through Juneau, Sauk and Columbia Counties, past Kendall, Elroy, Union Center, Wonewoc, La Valle, Reedsburg, Rock Springs, North Freedom, West Baraboo and Baraboo. It flows into the Wisconsin River from the west, about 3 mi (5 km) south of Portage.
In its upper course above Elroy, the river is paralleled by the Elroy-Sparta Bike Trail.
- At Union Center, the river collects the West Branch Baraboo River, which rises in eastern Vernon County and flows generally eastwardly past Hillsboro.
- Just downstream of La Valle, the river collects the Little Baraboo River, which rises in eastern Vernon County and flows generally eastwardly past Ironton. Along its course the Little Baraboo River briefly enters Richland County.
- "Term: Baraboo [origin of place name"] in Dictionary of Wisconsin History.
- Columbia Gazetteer of North America entry
- DeLorme (1992). Wisconsin Atlas & Gazetteer. Freeport, Maine: DeLorme. ISBN 0-89933-247-1.
- U.S. Geological Survey Geographic Names Information System: Baraboo River