Population Demographics
As of 2025 the population of Thayer County, NE is 5,071. The population is expected to shrink to 4,856 by 2030 - a growth rate of -0.86%.
The median age of Thayer County, NE residents is 46.
The diversity index of Thayer County, NE is 15.7, meaning that there is a 16% chance that any two people selected out of 100 residents will be of different race or ethnicity from one another.