
Thayer
- County:
- Neosho County
- County Seat:
- No
- Area (mi²):
- 0.545
- State:
- Kansas
Thayer is a city located in Neosho County, Kansas. Thayer has a 2025 population of 417. Thayer is currently declining at a rate of -0.95% annually and its population has decreased by -4.58% since the most recent census, which recorded a population of 437 in 2020.
The average household income in Thayer is $61,662 with a poverty rate of 28.63%. The median age in Thayer is 37.9 years: 36.8 years for males, and 41.2 years for females.