[3] According to the United States Census Bureau, the township has a total area of 34.2 square miles (89 km2), all land.

The racial makeup of the township was 95.28% White, 1.42% Native American, 1.42% Asian, and 1.89% from two or more races.

About 7.7% of families and 6.6% of the population were below the poverty line, including 4.2% of those under the age of eighteen and none of those 65 or over.

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

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