Population Demographics
As of 2025 the population of Cass County is 113,558. The population is expected to grow to 117,779 by 2030 - a growth rate of 0.73%.
The median age of Cass County residents is 41.
The diversity index of Cass County is 37.9, meaning that there is a 38% chance that any two people selected out of 100 residents will be of different race or ethnicity from one another.