Roseville is a census-designated place[2] mainly located in Ulster Township and a small portion in the northern part of Union Township in Floyd County in the state of Iowa.

As of the census of 2020,[5] there were 39 people, 8 households, and 8 families residing in the community.

There were 17 housing units at an average density of 4.6 per square mile (1.8/km2).

Hispanic or Latino persons of any race comprised 7.7% of the population.

0.0% of all households were made up of individuals, 0.0% had someone living alone who was 65 years old or older.