Below is a list of Muir MI zip codes. For your research we have also included Muir Area Code, Time Zone, UTC and the local Ionia County FIPS Code. Each Muir Michigan zip code has a center Longitude / Latitude point (the Muir center is -84.936302185059 / 43.001998901367). For your convenience we have also indicated if that zip code in Muir observes Daylight Savings time.