Population Demographics
As of 2026 the population of Long Prairie, MN is 3,750. The population is expected to grow to 3,804 by 2031 - a growth rate of 0.29%.
The median age of Long Prairie, MN residents is 37.
The diversity index of Long Prairie, MN is 82.0, meaning that there is a 82% chance that any two people selected out of 100 residents will be of different race or ethnicity from one another.