Below is a list of Williamsburg IA zip codes. For your research we have also included Williamsburg Area Code, Time Zone, UTC and the local Iowa County FIPS Code. Each Williamsburg Iowa zip code has a center Longitude / Latitude point (the Williamsburg center is -92.007301330566 / 41.668899536133). For your convenience we have also indicated if that zip code in Williamsburg observes Daylight Savings time.