The Town of Portland is located in Monroe County, Wisconsin, United States.

As of the census[2] of 2000, there were 686 people, 249 households, and 187 families residing in the town.

There were 273 housing units at an average density of 7.6 per square mile (2.9/km2).

The racial makeup of the town was 97.67% White, 0.15% African American, 1.90% Asian, and 0.29% from two or more races.

21.3% of all households comprised individuals, and 12.0% had someone living alone who was 65 years of age or older.