Below is a list of Hardtner KS zip codes. For your research we have also included Hardtner Area Code, Time Zone, UTC and the local Barber County FIPS Code. Each Hardtner Kansas zip code has a center Longitude / Latitude point (the Hardtner center is -98.649398803711 / 37.013801574707). For your convenience we have also indicated if that zip code in Hardtner observes Daylight Savings time.