Below is a list of Mercersburg PA zip codes. For your research we have also included Mercersburg Area Code, Time Zone, UTC and the local Franklin County FIPS Code. Each Mercersburg Pennsylvania zip code has a center Longitude / Latitude point (the Mercersburg center is -77.903999328613 / 39.833499908447). For your convenience we have also indicated if that zip code in Mercersburg observes Daylight Savings time.