Population Demographics
As of 2026 the population of Dunn County, ND is 4,094. The population is expected to grow to 4,133 by 2031 - a growth rate of 0.19%.
The median age of Dunn County, ND residents is 40.
The diversity index of Dunn County, ND is 46.6, meaning that there is a 47% chance that any two people selected out of 100 residents will be of different race or ethnicity from one another.