Plainwell is a city located in Michigan. With a 2020 population of 3,842, it is the 180th largest city in Michigan and the 5521st largest city in the United States. Plainwell is currently growing at a rate of 0.50% annually and its population has increased by 1.00% since the most recent census, which recorded a population of 3,804 in 2010. Plainwell reached it's highest population of 4,057 in 1990. Spanning over 2 miles, Plainwell has a population density of 1,929 people per square mile.
The average household income in Plainwell is $57,721 with a poverty rate of 15.37%. The median rental costs in recent years comes to $644 per month, and the median house value is $123,000. The median age in Plainwell is 41.4 years, 38.3 years for males, and 43.5 years for females. For every 100 females there are 84.5 males.