Below is a list of Monticello MO zip codes. For your research we have also included Monticello Area Code, Time Zone, UTC and the local Lewis County FIPS Code. Each Monticello Missouri zip code has a center Longitude / Latitude point (the Monticello center is -91.709701538086 / 40.121799468994). For your convenience we have also indicated if that zip code in Monticello observes Daylight Savings time.