Riverside Township is one of thirteen townships in Fremont County, Iowa, United States.

As of the 2010 census, its population was 313 and it contained 150 housing units.

[1] As of the 2010 census, Riverside Township covered an area of 35.96 square miles (93.1 km2); of this, 35.65 square miles (92.3 km2) (99.14 percent) was land and 0.31 square miles (0.80 km2) (0.86 percent) was water.

[1] The township contains Duff Cemetery,[3] Randolph Cemetery[4] and Riverside Cemetery.

[5]