Plainville is a city located in Kansas. With a 2020 population of 1,797, it is the 127th largest city in Kansas and the 8034th largest city in the United States. Plainville is currently declining at a rate of -1.10% annually and its population has decreased by -5.57% since the most recent census, which recorded a population of 1,903 in 2010. Plainville reached it's highest population of 1,915 in 2012. Spanning over 1 miles, Plainville has a population density of 1,502 people per square mile.
The average household income in Plainville is $64,242 with a poverty rate of 4.66%. The median rental costs in recent years comes to $632 per month, and the median house value is $88,500. The median age in Plainville is 36.7 years, 40.5 years for males, and 31.8 years for females. For every 100 females there are 74.7 males.