As of the 2010 United States census, its population was 168.

[1] In the 2000 United States census, Douglas had a total population of 212, bearing 162 adults 7 non-white residents.

[2] Douglas Township covers an area of 35.68 square miles (92.4 km2) and contains no incorporated settlements.

According to the USGS, it contains three cemeteries: Douglas Township, Fanny Fern and Zion.

This article about the geography of Clay County, Iowa is a stub.