Below is a list of Williamstown KY zip codes. For your research we have also included Williamstown Area Code, Time Zone, UTC and the local Grant County FIPS Code. Each Williamstown Kentucky zip code has a center Longitude / Latitude point (the Williamstown center is -84.560699462891 / 38.636600494385). For your convenience we have also indicated if that zip code in Williamstown observes Daylight Savings time.