| ZIP Codes: | 8 ZIP Codes (5 Standard, 3 PO Box, 0 Unique) [See All] |
| Area Code: | 252 |
| Timezone: | Eastern (GMT -05:00) |
| Local Time: | 11:54:17 PM |
| Population: | 21,425 [See All] |
| FIPS: | 37117 |
| Land Area: | 475 sq mi |
| Water Area: | 0 sq mi |
| Coordinates: | 35.8573, -77.1855 |
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21,425 residents live across 8 ZIPs covering 475 sq mi, served by 8 distinct USPS-recognized cities.
Population moved from 23,820 to 21,425 from 2014 to 2024 — a -10.1% change. 3 ZIPs gained residents, 5 lost.
The county's wealthiest ZIP 27857 (Oak City, $61,389 median) and poorest ZIP 27861 (Parmele , $28,681) are 11.4 miles apart — a 2.1× income gap across local geography.
Median home values vary 1.8× across this county — from $61,800 in 27840 (Hamilton) to $114,100 in 27871 (Robersonville).
Density varies 4× across the county — from 16 people/sq mi in 27857 (Oak City) to 68 in 27892 (Williamston).
Educational attainment ranges from 9.8% bachelor's+ in 27871 (Robersonville) to 23.9% in 27846 (Jamesville) — the breadth of educational profiles across the area.
Within North Carolina, this is the #77 most populous of 100 counties and ranks #98 for median household income .
Weighted by population, the typical household earns about $49,209 across the county — reflecting what a typical resident sees, not a simple ZIP average.
16.6% of adults age 25+ hold a bachelor's degree or higher (2,610 of 15,754 reporting).
5 Standard delivery, 3 PO Box only, 0 single-entity Unique ZIPs serve this county.
One ZIP holds the majority of this county's population — a sign of a county built around a single city or town.
Martin County lost 10.1% of residents between 2014 and 2024. ZIPs that shed the largest share:
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 27892 | Williamston | Standard | 13,262 | $48,223 | 193.7 | -8.8% |
| 27871 | Robersonville | Standard | 3,471 | $46,172 | 99.7 | -13.0% |
| 27846 | Jamesville | Standard | 3,022 | $55,147 | 104.8 | -11.7% |
| 27857 | Oak City | Standard | 1,099 | $61,389 | 70.5 | -10.3% |
| 27840 | Hamilton | Standard | 306 | $37,857 | 5.6 | -30.0% |
| 27861 | Parmele | PO Box | 120 | $28,681 | 0.0 | 13.2% |
| 27825 | Everetts | PO Box | 100 | $43,750 | 0.4 | 63.9% |
| 27841 | Hassell | PO Box | 45 | $21,667 | 0.0 | 32.4% |