[4] Portland is located in northern Iowa in eastern Cerro Gordo County, along the northeast bank of the Winnebago River.

As of the census of 2020,[6] there were 28 people, 18 households, and 14 families residing in the community.

There were 18 housing units at an average density of 18.1 per square mile (7.0/km2).

5.6% of all households were made up of individuals, 5.6% had someone living alone who was 65 years old or older.

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