Below is a list of Tecumseh MI zip codes. For your research we have also included Tecumseh Area Code, Time Zone, UTC and the local Lenawee County FIPS Code. Each Tecumseh Michigan zip code has a center Longitude / Latitude point (the Tecumseh center is -83.945198059082 / 42.004100799561). For your convenience we have also indicated if that zip code in Tecumseh observes Daylight Savings time.