Below is a list of Mongo IN zip codes. For your research we have also included Mongo Area Code, Time Zone, UTC and the local Lagrange County FIPS Code. Each Mongo Indiana zip code has a center Longitude / Latitude point (the Mongo center is -85.27970123291 / 41.685600280762). For your convenience we have also indicated if that zip code in Mongo observes Daylight Savings time.