Below is a list of Harwinton CT zip codes. For your research we have also included Harwinton Area Code, Time Zone, UTC and the local Litchfield County FIPS Code. Each Harwinton Connecticut zip code has a center Longitude / Latitude point (the Harwinton center is -73.060203552246 / 41.771198272705). For your convenience we have also indicated if that zip code in Harwinton observes Daylight Savings time.