Colony Township is a township in Delaware County, Iowa, United States.

As of the 2000 census, its population was 863.

[1] Colony Township covers an area of 36.29 square miles (94 square kilometers); of this, 0.01 square miles (0.02 square kilometers) or 0.02 percent is water.

(This list is based on USGS data and may include former settlements.)

The township contains four cemeteries: Oak Hill, Platt, Saint Patrick and Zion.