Nielsville ( ) is a city in Polk County, Minnesota, United States. It is part of the Grand Forks, ND-MN Metropolitan Statistical Area. The population was 78 at the 2020 census.

History

A post office has been in operation at Nielsville since 1883. Nielsville formerly had a depot on the railroad.

thumb|right|alt=Small white wooden building. The sign reads "United States Post Office, Nielsville, Minnesota 56568".|The Nielsville post office.

Geography

According to the United States Census Bureau, the city has a total area of , all land.

|align-fn=center

|footnote=U.S. Decennial Census<br>2020 Census