Below is a list of Keswick IA zip codes. For your research we have also included Keswick Area Code, Time Zone, UTC and the local Keokuk County FIPS Code. Each Keswick Iowa zip code has a center Longitude / Latitude point (the Keswick center is -92.239402770996 / 41.452701568604). For your convenience we have also indicated if that zip code in Keswick observes Daylight Savings time.