Below is a list of Williamsport IN zip codes. For your research we have also included Williamsport Area Code, Time Zone, UTC and the local Warren County FIPS Code. Each Williamsport Indiana zip code has a center Longitude / Latitude point (the Williamsport center is -87.294799804688 / 40.287899017334). For your convenience we have also indicated if that zip code in Williamsport observes Daylight Savings time.