Below is a list of Grantham PA zip codes. For your research we have also included Grantham Area Code, Time Zone, UTC and the local Cumberland County FIPS Code. Each Grantham Pennsylvania zip code has a center Longitude / Latitude point (the Grantham center is -77.00170135498 / 40.162700653076). For your convenience we have also indicated if that zip code in Grantham observes Daylight Savings time.