Population Demographics
As of 2025 the population of Bismarck is 76,981. The population is expected to grow to 79,770 by 2030 - a growth rate of 0.71%.
The median age of Bismarck residents is 39.
The diversity index of Bismarck is 35.1, meaning that there is a 35% chance that any two people selected out of 100 residents will be of different race or ethnicity from one another.