Below is a list of Mill Spring NC zip codes. For your research we have also included Mill Spring Area Code, Time Zone, UTC and the local Polk County FIPS Code. Each Mill Spring North Carolina zip code has a center Longitude / Latitude point (the Mill Spring center is -82.161903381348 / 35.297798156738). For your convenience we have also indicated if that zip code in Mill Spring observes Daylight Savings time.