Delhi Township is a township in Delaware County, Iowa, USA.

As of the 2000 census, its population was 1,047.

[1] Delhi Township covers an area of 35.93 square miles (93.07 square kilometers); of this, 0.28 square miles (0.72 square kilometers) or 0.77 percent is water.

The stream of Allison Creek runs through this township.

The township contains four cemeteries: Allison, Evergreen, Plum Creek and Saint Johns.