Thayer is a city in Neosho County, Kansas, United States.

[9] The climate in this area is characterized by hot, humid summers and generally mild to cool winters.

There were 221 housing units at an average density of 294.7 per square mile (113.8/km2).

The racial makeup of the city was 95.6% White, 0.8% Native American, 0.2% Asian, and 3.4% from two or more races.

27.4% of all households were made up of individuals, and 11.2% had someone living alone who was 65 years of age or older.

There were 203 housing units at an average density of 305.1 per square mile (117.8/km2).

21.9% of all households were made up of individuals, and 6.6% had someone living alone who was 65 years of age or older.