Below is a list of Plainwell MI zip codes. For your research we have also included Plainwell Area Code, Time Zone, UTC and the local Allegan County FIPS Code. Each Plainwell Michigan zip code has a center Longitude / Latitude point (the Plainwell center is -85.641899108887 / 42.446701049805). For your convenience we have also indicated if that zip code in Plainwell observes Daylight Savings time.