Below is a list of Slope County ND zip codes. For your research we have also included Slope County Area Code, Time Zone, UTC and the local County FIPS Code. Each Slope County North Dakota zip code has a center Longitude / Latitude point (the Slope County center is -103.58499908447 / 46.431701660156). For your convenience we have also indicated if that zip code in Slope County observes Daylight Savings time.