Portland Township is located in Whiteside County, Illinois.

As of the 2010 census, its population was 422 and it contained 186 housing units.

[2] According to the 2010 census, the township has a total area of 35.65 square miles (92.3 km2), of which 34.73 square miles (90.0 km2) (or 97.42%) is land and 0.92 square miles (2.4 km2) (or 2.58%) is water.

This Whiteside County, Illinois location article is a stub.

You can help Wikipedia by expanding it.