Below is a list of Keystone Heights FL zip codes. For your research we have also included Keystone Heights Area Code, Time Zone, UTC and the local Clay County FIPS Code. Each Keystone Heights Florida zip code has a center Longitude / Latitude point (the Keystone Heights center is -82.031898498535 / 29.778799057007). For your convenience we have also indicated if that zip code in Keystone Heights observes Daylight Savings time.