Plainwell is a very small city located in the state of Michigan. With a population of 3,747 people and three associated neighborhoods, Plainwell is the 239th largest community in Michigan.

The population of Plainwell overall has a level of education that is slightly above the US average for all US cities and towns of 21.84%. Of adults 25 and older in Plainwell, 21.82% have at least a bachelor's degree.

The per capita income in Plainwell in 2022 was $29,263, which is lower middle income relative to Michigan and the nation. This equates to an annual income of $117,052 for a family of four. However, Plainwell contains both very wealthy and poor people as well.

Plainwell is a somewhat ethnically-diverse city. The people who call Plainwell home describe themselves as belonging to a variety of racial and ethnic groups. The greatest number of Plainwell residents report their race to be White, followed by Black or African-American. Plainwell also has a sizeable Hispanic population (people of Hispanic origin can be of any race). People of Hispanic or Latino origin account for 11.56% of the city’s residents. Important ancestries of people in Plainwell include German, English, Irish, Dutch, and Polish.

The most common language spoken in Plainwell is English. Other important languages spoken here include Polish and Spanish.