Ewington Township was organized in 1873, and named for Thomas C. Ewing, a pioneer settler.

[3] According to the United States Census Bureau, the township has a total area of 35.7 square miles (92 km2), all land.

About 2.6% of families and 3.9% of the population were below the poverty line, including none of those under the age of eighteen and 15.2% of those 65 or over.

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

At the state level, Ewington Township is located in Senate District 22, represented by Republican Doug Magnus, and in House District 22B, represented by Republican Rod Hamilton.