Williams County, ND ZIP codes
There are 11 ZIP codes in Williams County, ND, in 9 towns, from 58755 to 58856. The largest are 58801 (Williston), 58852 (Tioga) and 58849 (Ray).
The county seat is Williston.
- ZIP codes
- 11
- Towns
- 9
- County seat
- Williston
- County FIPS
38105- State
- North Dakota
- Population
- 39,555
- Median household income
- $85,595
- Land area
- 2,078 sq mi
- Area code
- 701
- Metro area
- Williston
Williams County ZIP codes by town
Each ZIP code is listed under the county most of its land lies in and the town the Postal Service names it for; a ZIP code's own page shows exactly how it is split.
Map of Williams County ZIP codes
The ZIP codes of Williams County, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.
Williams County in numbers
About 39,555 people live in Williams County, in 15,154 households, the 5th most populous of North Dakota's 53 counties. The median household income is $85,595 a year, 12% above the North Dakota median of $76,657 (US: $80,734). The median owner-occupied home is valued at $284,800 (14% above the North Dakota median), and median gross rent is $1,123 a month. The median age is 31.8; 24.4% of adults 25 and over hold a bachelor's degree or higher (32.7% across North Dakota); the average commute takes 19 minutes.
| Population | 39,555 |
|---|---|
| Households | 15,154 |
| Median age | 31.8 |
| Median household income | $85,595 |
| Median home value | $284,800 |
| Median gross rent | $1,123 |
| Bachelor's degree or higher | 24.4% |
| Mean commute | 18.7 min |
| Population density | 19 / sq mi |
U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates. Survey estimates carry margins of error, wider for small places. Sources and methods.
Largest towns in Williams County
| Town | ZIP codes | Population |
|---|---|---|
| Williston | 3 | 28,056 |
| Tioga | 1 | 1,657 |
| Ray | 1 | 714 |
| Grenora | 1 | 408 |
| Trenton | 1 | 406 |
| Zahl | 1 | 211 |
| Epping | 1 | 124 |
| Mcgregor | 1 | 108 |
| Alamo | 1 | 47 |
Population of the census place of that name where there is one, otherwise of the ZIP codes the Postal Service addresses by it. A town's ZIP codes can reach past the county line.
Neighbouring counties
Counties that share a ZIP code with Williams County.
Not sure you are in Williams County? What county am I in? answers from your location, near a county line included.
Every ZIP code in Williams County, with figures
| ZIP | City | Type | Population | Median income | Median home |
|---|---|---|---|---|---|
58755 | Mcgregor , ND | Standard | 133 | $138,705 | $95,600 |
58801 | Williston , ND | Standard | 34,277 | $84,702 | $298,300 |
58802 | Williston , ND | No street area | — | — | — |
58803 | Williston , ND | No street area | — | — | — |
58830 | Alamo , ND | Standard | 66 | $54,063 | $162,500 |
58843 | Epping , ND | Standard | 676 | $118,750 | $362,500 |
58845 | Grenora , ND | Standard | 584 | $91,806 | — |
58849 | Ray , ND | Standard | 1,101 | $82,250 | $269,800 |
58852 | Tioga , ND | Standard | 2,087 | $80,595 | $209,300 |
58853 | Trenton , ND | Standard | 354 | $107,969 | $310,800 |
58856 | Zahl , ND | Standard | 211 | $104,688 | — |
Cite this page
zipcodes.pro. “Williams County ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/state/nd/county/williams
Underlying data is public domain or openly licensed — sources, vintages and licences.