Norwalk is a village in Monroe County, Wisconsin, United States. The population was 653 at the 2000 census.
Norwalk, Wisconsin was given its name by Selium McGary, one of the pioneers of Monroe County, who named it after Norwalk, Ohio, where he had previously lived. It is located on what was once the main line of the Chicago and North Western, which in the 1960s was converted into the Elroy-Sparta Bike Trail.
According to the United States Census Bureau, the village has a total area of 1.0 square miles (2.7 km²), all of it land.