Cass County, ND: Cities, ZIP Codes & Population
Cass County is a county-level area in North Dakota identified by the FIPS code 38017. Our data lists 30 places in it, led by Fargo, ND, with combined estimates of about 258,276 people across those places. This page shows its cities, ZIP codes, time zone and neighboring counties.
What are the key facts about Cass County?
| County | Cass County |
|---|---|
| State | North Dakota |
| FIPS code | 38017 |
| Places in our data | 30 |
| Places with a city page | 2 |
| Combined place estimates | 258,276 |
| Largest place | Fargo, ND (208,675) |
| Rank in state | 1st of 53 counties by combined place population |
| Weighted density | 2,385 per sq mi |
| Time zone | Central time |
| ZIP codes | 35 |
Which cities and towns are in Cass County?
Cass County has 2 places large enough for a full page on this site. They are ranked below by estimated population, together with whether each is incorporated, its density in people per square mile and the number of ZIP codes it uses. Fargo, ND is the largest, followed by West Fargo, ND.
| Place | Type | Population | Per sq mi | ZIPs |
|---|---|---|---|---|
| Fargo, ND | Incorporated | 208,675 | 2,505 | 13 |
| West Fargo, ND | Incorporated | 37,058 | 2,310 | 1 |
The county also contains 28 smaller communities that appear here but do not have separate pages because their populations are too small for reliable data: Horace, Casselton, Mapleton, Harwood, Kindred, Reile's Acres, Argusville, Arthur, Oxbow, Davenport, Tower City, Hunter, Leonard, Page, Frontier, Buffalo, Grandin, Brooktree Park, Amenia, Gardner, Briarwood, North River, Prairie Rose, Alice, Wheatland, Erie, Embden, Ayr. Residents of these places often depend on the county for services such as roads, courts and public health.
How large is Cass County compared with other counties in North Dakota?
Adding up the estimates for the places in our data gives 258,276 people, which ranks Cass County 1st among 53 counties in North Dakota. The average listed place has about 8,609 residents. The weighted density is about 2,385 people per square mile, which is suburban by our scale. These totals add up place estimates, so they can differ from the official county population, which includes people outside any listed place. See why population figures differ.
What ZIP codes are in Cass County?
The places in Cass County use 35 ZIP codes: 58004, 58005, 58006, 58007, 58011, 58012, 58021, 58027, 58029, 58031, 58036, 58038, 58042, 58047, 58048, 58051, 58052, 58059, 58064, 58071, 58078, 58079, 58102, 58103, 58104, 58105, 58106, 58107, 58108, 58109, 58121, 58122, 58124, 58125, 58126. Every code begins with 5, which is assigned to the Upper Midwest and northern Plains (Iowa, Minnesota, Montana, the Dakotas and Wisconsin). A ZIP code can cross county lines, so a code listed here may also serve addresses in a neighboring county. Use the ZIP code lookup to check a single code, or read how ZIP codes work.
Which counties are near Cass County?
The closest counties by distance between the average locations of their places are listed below. The distance is a rough guide to how close the areas are, because county shapes vary widely.
- Clay County, MN — about 27 miles east (center to center), 56,003 people in listed places
- Norman County, MN — about 36 miles northeast (center to center), 3,720 people in listed places
- Traill County, ND — about 39 miles north (center to center), 5,556 people in listed places
- Ransom County, ND — about 41 miles southwest (center to center), 3,183 people in listed places
- Barnes County, ND — about 44 miles west (center to center), 7,428 people in listed places
- Richland County, ND — about 46 miles south (center to center), 14,594 people in listed places
What does the FIPS code 38017 mean?
The first two digits, 38, identify North Dakota, and the last three, 017, identify Cass County inside that state. Government datasets use this code to join records without confusing counties that share a name. Our guide to counties and FIPS codes explains the numbering, and the North Dakota hub lists every county we cover in the state.
Where to go next
Combined place populations are estimates from a compiled dataset and are not official county totals.