Marshfield is a town in Washington County, Maine, United States.

[1] As of the census[4] of 2010, there were 518 people, 199 households, and 148 families living in the town.

There were 246 housing units at an average density of 14.5 per square mile (5.6/km2).

20.1% of all households were made up of individuals, and 6.5% had someone living alone who was 65 years of age or older.

There were 239 housing units at an average density of 14.0 per square mile (5.4/km2).

20.4% of all households were made up of individuals, and 8.7% had someone living alone who was 65 years of age or older.