Below is a list of Karns City PA zip codes. For your research we have also included Karns City Area Code, Time Zone, UTC and the local Butler County FIPS Code. Each Karns City Pennsylvania zip code has a center Longitude / Latitude point (the Karns City center is -79.724700927734 / 40.995399475098). For your convenience we have also indicated if that zip code in Karns City observes Daylight Savings time.