The total population of Nielsville is estimated to be 88 with 39 males (44.32%) and 49 females (55.68%). There are 10 more females than males in Nielsville.
In 2022, the population of Nielsville was 78, a 1.27% decrease year-by-year from 2021. Previously, in 2021, Nielsville's population was 79, a decline of 1.25% compared to a population of 80 in 2020.
The median age in Nielsville, MN is 32.5, as per 2021 ACS 5-Year Estimates. Of the total population, 29.27% were under the age of 15, 15.85% aged 15 to 29, 51.22% aged 30 to 64, 3.66% aged 65 to 84, and 0.00% were 85 years of age and older.