Below is a list of Martinsburg IA zip codes. For your research we have also included Martinsburg Area Code, Time Zone, UTC and the local Keokuk County FIPS Code. Each Martinsburg Iowa zip code has a center Longitude / Latitude point (the Martinsburg center is -92.256698608398 / 41.17679977417). For your convenience we have also indicated if that zip code in Martinsburg observes Daylight Savings time.