Williams County, North Dakota ZIP codes
11 ZIP codes are in Williams County, plus 1 that cross in from neighboring counties. It's part of the Williston, ND micro area.
- ZIP codes
- 11
- Population in these ZIPs
- 39,489
- Avg. median income
- $85,600population-weighted
- Cities & towns
- 9
Click anywhere on the map to see which ZIP code it's in.
ZIP codes in Williams County
| ZIP code | City | Population | Median income | Typical home value |
|---|---|---|---|---|
| 58755 | Mcgregor | 133 | $138,705 | $95,600 |
| 58801 | Williston | 34,277 | $84,702 | $370,400 |
| 58802 PO Box | Williston | — | — | — |
| 58803 PO Box | Williston | — | — | — |
| 58830 | Alamo | 66 | $54,063 | $162,500 |
| 58843 | Epping | 676 | $118,750 | $337,000 |
| 58845 | Grenora | 584 | $91,806 | — |
| 58849 | Ray | 1,101 | $82,250 | $262,400 |
| 58852 | Tioga | 2,087 | $80,595 | $262,800 |
| 58853 | Trenton | 354 | $107,969 | $310,800 |
| 58856 | Zahl | 211 | $104,688 | — |
ZIP codes partly in Williams County
These ZIP codes are mostly in a neighboring county but cover part of Williams County.
| ZIP code | City | County | Population | Median income | Typical home value |
|---|---|---|---|---|---|
| 58795 | Wildrose | Divide County | 414 | $117,344 | $149,100 |
Population and median household income: ACS 2020–2024 5-year estimates. Typical home value: Zillow Home Value Index (September 2026) where available, otherwise the ACS median owner-reported value. "PO Box" marks ZIP codes with no delivery area of their own. Methodology
Cities and towns in Williams County
Nearby counties
Frequently asked questions
How many ZIP codes are in Williams County, North Dakota?
11 ZIP codes are mainly in Williams County, and 1 more ZIP codes from neighboring areas reach partly into it.
What cities are in Williams County?
ZIP codes in Williams County use the city names Alamo, Epping, Grenora, Mcgregor, Ray, Tioga, Trenton, Williston and Zahl.
What metro area is Williams County in?
Williams County is part of the Williston, ND micropolitan statistical area.