Below is a list of Hummelstown PA zip codes. For your research we have also included Hummelstown Area Code, Time Zone, UTC and the local Dauphin County FIPS Code. Each Hummelstown Pennsylvania zip code has a center Longitude / Latitude point (the Hummelstown center is -76.710998535156 / 40.265201568604). For your convenience we have also indicated if that zip code in Hummelstown observes Daylight Savings time.