Estherville Township is one of twelve townships in Emmet County, Iowa, United States. As of the 2000 census, its population was 7,077.
Estherville Township takes its name from the county seat of Estherville. It was created prior to 1876, but the exact date is unknown because the records were destroyed in a courthouse fire.
According to the United States Census Bureau, Estherville Township covers an area of 36.15 square miles (93.63 square kilometers); of this, 35.81 square miles (92.75 square kilometers, 99.06 percent) is land and 0.34 square miles (0.88 square kilometers, 0.94 percent) is water.
The township contains these five cemeteries: East Side, Estherville Lutheran, Norwegian, Oak Hill and Saint Patricks.