Spring Brook is a town in Dunn County, Wisconsin, United States.

The unincorporated community of Falls City is located in the town.

There were 489 housing units at an average density of 8.0 per square mile (3.1/km2).

On March 22, 2018, Ezra McCandless stabbed 24-year-old Alex Woodworth to death near to one of the dairy farms of the town.

On February 7, 2020, she was sentenced at nearby Dunn County Judicial Center, to life imprisonment, with the possibility of parol after 50 years.