[4] According to the United States Census Bureau, the township has a total area of 35.6 square miles (92 km2), all land.

26.0% of all households were made up of individuals, and 11.0% had someone living alone who was 65 years of age or older.

About 8.3% of families and 7.8% of the population were below the poverty line, including 16.7% of those under the age of eighteen and none of those 65 or over.

Amboy Township is located in Minnesota's 7th congressional district, represented by Michelle Fischbach, a Republican.

At the state level, Jeffers is located in Senate District 22, represented by Republican Bill Weber (politician), and in House District 22B, represented by Republican Brian Pfarr.