Population Demographics
As of 2026 the population of Thayer County, NE is 5,121. The population is expected to shrink to 5,111 by 2031 - a growth rate of -0.04%.
The median age of Thayer County, NE residents is 47.
The diversity index of Thayer County, NE is 15.5, 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.