Below is a list of Ohlman IL zip codes. For your research we have also included Ohlman Area Code, Time Zone, UTC and the local Montgomery County FIPS Code. Each Ohlman Illinois zip code has a center Longitude / Latitude point (the Ohlman center is -89.218696594238 / 39.345001220703). For your convenience we have also indicated if that zip code in Ohlman observes Daylight Savings time.