Population Demographics
As of 2026 the population of Kearny County is 3,902. The population is expected to shrink to 3,849 by 2031 - a growth rate of -0.27%.
The median age of Kearny County residents is 36.
The diversity index of Kearny County is 74.7, meaning that there is a 75% chance that any two people selected out of 100 residents will be of different race or ethnicity from one another.
