[3] Prior to organization in 1878, this area was known as Creswell, after a local post office.

23.9% of all households were made up of individuals, and 5.6% had someone living alone who was 65 years of age or older.

About 2.1% of families and 4.6% of the population were below the poverty line, including none of those under the age of eighteen and 12.0% of those 65 or over.

Belfast Township is located in Minnesota's 1st congressional district, represented by Mankato educator Tim Walz, a Democrat.

At the state level, Belfast Township is located in Senate District 22, represented by Republican Doug Magnus, and in House District 22A, represented by Republican Joe Schomacker.