Thayer is a city located in Missouri. With a 2020 population of 2,063, it is the 237th largest city in Missouri and the 7492nd largest city in the United States. Thayer is currently declining at a rate of -1.90% annually and its population has decreased by -8.02% since the most recent census, which recorded a population of 2,243 in 2010. Thayer reached it's highest population of 2,254 in 2011. Spanning over 2 miles, Thayer has a population density of 844 people per square mile.
The average household income in Thayer is $38,808 with a poverty rate of 28.55%. The median rental costs in recent years comes to $446 per month, and the median house value is $85,000. The median age in Thayer is 36.6 years, 35.4 years for males, and 37.5 years for females. For every 100 females there are 95.9 males.