| ZIP Codes: | 20 ZIP Codes (11 Standard, 7 PO Box, 2 Unique) [See All] |
| Area Code: | 479 |
| Timezone: | Central (GMT -06:00) |
| Local Time: | 2:11:26 PM |
| Population: | 125,834 [See All] |
| FIPS: | 05131 |
| CBSA: | Fort Smith, AR-OK |
| Land Area: | 489 sq mi |
| Water Area: | 10 sq mi |
| Coordinates: | 35.2812, -94.3546 |
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125,834 residents live across 20 ZIPs covering 489 sq mi, served by 8 distinct USPS-recognized cities.
Population moved from 124,166 to 125,834 from 2014 to 2024 — a +1.3% change. 7 ZIPs gained residents, 5 lost.
The county's wealthiest ZIP 72916 (Fort Smith, $87,983 median) and poorest ZIP 72904 (Fort Smith, $41,909) are 9.7 miles apart — a 2.1× income gap across local geography.
Median home values vary 2.4× across this county — from $111,500 in 72904 (Fort Smith) to $263,700 in 72916 (Fort Smith).
Density varies 132× across the county — from 15 people/sq mi in 72938 (Hartford) to 2,040 in 72901 (Fort Smith).
Most of the decade's growth concentrated around Fort Smith — top growth ZIPs averaged +23.4% over the past ten years ( 72916 , 72937 and 72908 ).
Educational attainment ranges from 7.7% bachelor's+ in 72904 (Fort Smith) to 40.1% in 72916 (Fort Smith) — the breadth of educational profiles across the area.
Within Arkansas, this is the #5 most populous of 78 counties and ranks #23 for median household income .
Weighted by population, the typical household earns about $60,070 across the county — reflecting what a typical resident sees, not a simple ZIP average.
23.6% of adults age 25+ hold a bachelor's degree or higher (19,962 of 84,445 reporting). The most-educated ZIPs cluster around Fort Smith.
11 Standard delivery, 7 PO Box only, 2 single-entity Unique ZIPs serve this county.
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 72903 | Fort Smith | Standard | 27,242 | $61,434 | 18.6 | 1.5% |
| 72904 | Fort Smith | Standard | 21,296 | $41,909 | 17.2 | 5.8% |
| 72901 | Fort Smith | Standard | 19,819 | $42,851 | 9.7 | -13.8% |
| 72908 | Fort Smith | Standard | 14,288 | $72,732 | 8.0 | 5.9% |
| 72936 | Greenwood | Standard | 14,070 | $71,829 | 138.6 | -4.1% |
| 72916 | Fort Smith | Standard | 11,711 | $87,983 | 38.6 | 56.0% |
| 72941 | Lavaca | Standard | 5,140 | $73,558 | 77.3 | -11.3% |
| 72923 | Barling | Standard | 4,956 | $54,157 | 9.9 | 2.8% |
| 72937 | Hackett | Standard | 4,075 | $61,590 | 63.0 | 8.2% |
| 72940 | Huntington | Standard | 1,829 | $58,056 | 42.9 | -24.6% |
| 72938 | Hartford | Standard | 933 | $45,114 | 60.3 | -36.8% |
| 72945 | Midland | PO Box | 475 | $36,868 | 0.7 | 93.9% |
| 72905 | Fort Smith | Unique | 0 | — | 4.5 | — |
| 72918 | Fort Smith | PO Box | — | — | 0.0 | — |
| 72906 | Fort Smith | PO Box | — | — | 0.0 | — |
| 72919 | Fort Smith | Unique | — | — | 0.0 | — |
| 72917 | Fort Smith | PO Box | — | — | 0.0 | — |
| 72913 | Fort Smith | PO Box | — | — | 0.0 | — |
| 72902 | Fort Smith | PO Box | — | — | 0.0 | — |
| 72914 | Fort Smith | PO Box | — | — | 0.0 | — |