Thayer is a city located in Kansas. With a 2020 population of 462, it is the 293rd largest city in Kansas and the 13683rd largest city in the United States. Thayer is currently declining at a rate of -0.22% annually and its population has decreased by -7.04% since the most recent census, which recorded a population of 497 in 2010. Thayer reached it's highest population of 495 in 2010. Spanning over 1 miles, Thayer has a population density of 614 people per square mile.
The average household income in Thayer is $49,918 with a poverty rate of 16.75%. The median rental costs in recent years comes to $587 per month, and the median house value is $68,900. The median age in Thayer is 32.5 years, 28.2 years for males, and 46.5 years for females. For every 100 females there are 112.9 males.