Schleswig is a town in Manitowoc County, Wisconsin, United States.

As of the census[2] of 2000, there were 1,900 people, 697 households, and 549 families residing in the town.

There were 871 housing units at an average density of 26.3 per square mile (10.2/km2).

There were 697 households, out of which 35.7% had children under the age of 18 living with them, 72.6% were married couples living together, 2.7% had a female householder with no husband present, and 21.1% were non-families.

16.5% of all households were made up of individuals, and 8.2% had someone living alone who was 65 years of age or older.