Below is a list of Coldwater OH zip codes. For your research we have also included Coldwater Area Code, Time Zone, UTC and the local Mercer County FIPS Code. Each Coldwater Ohio zip code has a center Longitude / Latitude point (the Coldwater center is -84.628700256348 / 40.479801177979). For your convenience we have also indicated if that zip code in Coldwater observes Daylight Savings time.