Below is a list of Adelphi OH zip codes. For your research we have also included Adelphi Area Code, Time Zone, UTC and the local Ross County FIPS Code. Each Adelphi Ohio zip code has a center Longitude / Latitude point (the Adelphi center is -82.747901916504 / 39.466598510742). For your convenience we have also indicated if that zip code in Adelphi observes Daylight Savings time.