Population Demographics
As of 2025 the population of Sac County is 9,763. The population is expected to shrink to 9,561 by 2030 - a growth rate of -0.42%.
The median age of Sac County residents is 46.
The diversity index of Sac County is 20.8, meaning that there is a 21% chance that any two people selected out of 100 residents will be of different race or ethnicity from one another.