| ZIP Codes: | 34 ZIP Codes (24 Standard, 5 PO Box, 5 Unique) [See All] |
| Area Code: | 701 |
| Timezone: | Central (GMT -06:00) |
| Local Time: | 11:54:20 PM |
| Population: | 193,837 [See All] |
| FIPS: | 38017 |
| CBSA: | Fargo, ND-MN |
| Land Area: | 1,843 sq mi |
| Water Area: | 2 sq mi |
| Coordinates: | 46.9273, -97.0594 |
| Quick Link: |
193,837 residents live across 34 ZIPs covering 1,843 sq mi, served by 22 distinct USPS-recognized cities.
Population moved from 158,283 to 193,837 from 2014 to 2024 — a +22.5% change. 16 ZIPs gained residents, 8 lost (and 1 held flat).
The county's wealthiest ZIP 58047 (Horace, $142,361 median) and poorest ZIP 58103 (Fargo, $58,801) are 9.8 miles apart — a 2.4× income gap across local geography.
Median home values vary 1.8× across this county — from $242,200 in 58102 (Fargo) to $432,200 in 58047 (Horace).
Density varies 406× across the county — from 13 people/sq mi in 58059 (Mapleton) to 5,329 in 58105 (Fargo).
Educational attainment ranges from 35.8% bachelor's+ in 58103 (Fargo) to 49.1% in 58104 (Fargo) — the breadth of educational profiles across the area.
Within North Dakota, this is the #1 most populous of 64 counties and ranks #4 for median household income with the #5 fastest decade growth .
Hosts 4 single-entity Unique ZIPs: 58126Wells Fargo ; 58124Bank Of The West ; 58122Sanford ; and 58125Us Bank .
Weighted by population, the typical household earns about $79,134 across the county — reflecting what a typical resident sees, not a simple ZIP average.
42.7% of adults age 25+ hold a bachelor's degree or higher (52,244 of 122,294 reporting). The most-educated ZIPs cluster around Fargo.
24 Standard delivery, 5 PO Box only, 5 single-entity Unique ZIPs serve this county.
1 ZIP in this county where more than 60% of adults 25+ hold a bachelor's degree — typically college campuses, research enclaves, or tech corridors.
5 ZIP codes in this county serve a single facility — typically theme parks, universities, large corporations, airports, or government complexes.
Cass County grew 22.5% over the past decade — concentrated in 5 high-growth ZIPs:
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 58104 | Fargo | Standard | 49,168 | $85,747 | 27.7 | 56.4% |
| 58103 | Fargo | Standard | 48,796 | $58,801 | 11.5 | 0.6% |
| 58078 | West Fargo | Standard | 40,631 | $91,040 | 38.4 | 41.4% |
| 58102 | Fargo | Standard | 32,912 | $59,533 | 31.8 | 5.4% |
| 58047 | Horace | Standard | 5,636 | $142,361 | 73.3 | 46.1% |
| 58012 | Casselton | Standard | 3,049 | $75,000 | 64.1 | 16.2% |
| 58105 | Fargo | PO Box | 2,825 | $123,636 | 0.5 | 42.9% |
| 58051 | Kindred | Standard | 1,980 | $107,396 | 103.4 | 46.1% |
| 58059 | Mapleton | Standard | 1,670 | $115,469 | 127.2 | 50.3% |
| 58042 | Harwood | Standard | 1,344 | $137,500 | 44.3 | -13.7% |
| 58005 | Argusville | Standard | 898 | $142,917 | 126.4 | 47.0% |
| 58021 | Davenport | Standard | 584 | $108,750 | 66.5 | 43.1% |
| 58006 | Arthur | Standard | 573 | $95,313 | 50.2 | 26.8% |
| 58052 | Leonard | Standard | 529 | $87,813 | 160.9 | -27.9% |
| 58048 | Hunter | Standard | 505 | $100,227 | 105.0 | -14.6% |
| 58079 | Wheatland | Standard | 504 | $126,477 | 138.2 | -10.8% |
| 58071 | Tower City | Standard | 486 | $109,375 | 104.6 | 27.9% |
| 58011 | Buffalo | Standard | 449 | $99,853 | 108.8 | 15.4% |
| 58036 | Gardner | Standard | 360 | $100,625 | 52.6 | 5.0% |
| 58064 | Page | Standard | 332 | $75,625 | 167.6 | -37.7% |
| 58004 | Amenia | Standard | 241 | $72,250 | 56.4 | 10.0% |
| 58038 | Grandin | Standard | 179 | $112,750 | 80.6 | -48.9% |
| 58029 | Erie | Standard | 88 | $145,625 | 45.5 | -61.1% |
| 58007 | Ayr | Standard | 81 | $81,250 | 52.1 | 0.0% |
| 58002 | Absaraka | Standard | 17 | — | 5.0 | -19.0% |
| 58126 | Fargo | Unique | — | — | 0.0 | — |
| 58124 | Fargo | Unique | — | — | 0.0 | — |
| 58108 | Fargo | PO Box | — | — | 0.0 | — |
| 58107 | Fargo | PO Box | — | — | 0.0 | — |
| 58122 | Fargo | Unique | — | — | 0.0 | — |
| 58125 | Fargo | Unique | — | — | 0.0 | — |
| 58109 | Fargo | PO Box | — | — | 0.0 | — |
| 58106 | Fargo | PO Box | — | — | 0.0 | — |
| 58121 | Fargo | Unique | — | — | 0.0 | — |