There are 9 zip codes in Williams County, North Dakota. The most populated is 58801, located in Williston. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
City
Population
58801Williston33,579
58852Tioga1,973
58849Ray1,171
58843Epping951
58845Grenora582
58853Trenton494
58755Mcgregor206
58830Alamo154
58856Zahl70

Williams County, North Dakota Zip Codes by Population (2024)