Fairfield Township, Bureau County, Illinois

[1] According to the 2010 census, the township has a total area of 36.39 square miles (94.2 km2), all land.

There were 142 housing units at an average density of 3.90 per square mile (1.51/km2).

The racial makeup of the township was 95.51% White, 0.53% African American, 0.00% Native American, 0.53% Asian, 0.79% Pacific Islander, 0.26% from other races, and 2.37% from two or more races.

There were 114 households, out of which 45.60% had children under the age of 18 living with them, 82.46% were married couples living together, 10.53% had a female householder with no spouse present, and 7.02% were non-families.

7.00% of all households were made up of individuals, and 7.00% had someone living alone who was 65 years of age or older.

Map of Illinois highlighting Bureau County