Darien is a town in Walworth County, Wisconsin, United States.
The unincorporated communities of Allen's Grove and Fairfield are also located partially in the town.
As of the census[1] of 2000, there were 1,747 people, 615 households, and 485 families residing in the town.
There were 650 housing units at an average density of 19.1 per square mile (7.4/km2).
16.4% of all households were made up of individuals, and 5.5% had someone living alone who was 65 years of age or older.