Below is a list of Viola IL zip codes. For your research we have also included Viola Area Code, Time Zone, UTC and the local Mercer County FIPS Code. Each Viola Illinois zip code has a center Longitude / Latitude point (the Viola center is -90.586898803711 / 41.20299911499). For your convenience we have also indicated if that zip code in Viola observes Daylight Savings time.