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