Plainwell is a very small city located in the state of Michigan. With a population of 3,740 people and three associated neighborhoods, Plainwell is the 239th largest community in Michigan.

The percentage of adults in Plainwell who are college-educated is close to the national average for all communities of 21.84%: 19.27% of the adults in Plainwell have a bachelor's degree or advanced degree.

The per capita income in Plainwell in 2018 was $26,753, which is lower middle income relative to Michigan and the nation. This equates to an annual income of $107,012 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 12.62% of the city’s residents. Important ancestries of people in Plainwell include German, English, Dutch, Irish, and European.

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