Population Demographics
As of 2026 the population of Marion, AR is 13,290. The population is expected to shrink to 12,859 by 2031 - a growth rate of -0.66%.
The median age of Marion, AR residents is 37.
The diversity index of Marion, AR is 60.8, meaning that there is a 61% chance that any two people selected out of 100 residents will be of different race or ethnicity from one another.