| ZIP Codes: | 12 ZIP Codes (10 Standard, 2 PO Box, 0 Unique) [See All] |
| Area Codes: | 304 / 681 |
| Timezone: | Eastern (GMT -05:00) |
| Local Time: | 11:55:41 PM |
| Population: | 128,889 [See All] |
| FIPS: | 54003 |
| CBSA: | Hagerstown-Martinsburg, MD-WV |
| Land Area: | 322 sq mi |
| Water Area: | 0 sq mi |
| Coordinates: | 39.4333, -78.0206 |
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128,889 residents live across 12 ZIPs covering 322 sq mi, served by 8 distinct USPS-recognized cities.
Population moved from 107,809 to 128,889 from 2014 to 2024 — a +19.6% change. 9 ZIPs gained residents, 0 lost.
The county's wealthiest ZIP 25413 (Bunker Hill, $100,556 median) and poorest ZIP 25401 (Martinsburg, $51,909) are 11.1 miles apart — a 1.9× income gap across local geography.
Median home values vary 1.3× across this county — from $229,200 in 25401 (Martinsburg) to $298,500 in 25403 (Martinsburg).
Density varies 19× across the county — from 135 people/sq mi in 25427 (Hedgesville) to 2,537 in 25401 (Martinsburg).
Educational attainment ranges from 15.4% bachelor's+ in 25428 (Inwood) to 40.5% in 25420 (Gerrardstown) — the breadth of educational profiles across the area.
Within West Virginia, this is the #2 most populous of 55 counties and ranks #2 for median household income with the #1 fastest decade growth .
Weighted by population, the typical household earns about $81,802 across the county — reflecting what a typical resident sees, not a simple ZIP average.
24.5% of adults age 25+ hold a bachelor's degree or higher (22,050 of 90,007 reporting).
10 Standard delivery, 2 PO Box only, 0 single-entity Unique ZIPs serve this county.
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 25404 | Martinsburg | Standard | 23,990 | $70,633 | 38.1 | 9.7% |
| 25427 | Hedgesville | Standard | 16,595 | $87,184 | 122.9 | 34.2% |
| 25403 | Martinsburg | Standard | 16,470 | $87,512 | 40.0 | 19.5% |
| 25401 | Martinsburg | Standard | 14,979 | $51,909 | 5.9 | 0.4% |
| 25428 | Inwood | Standard | 14,825 | $82,885 | 21.5 | 37.8% |
| 25405 | Martinsburg | Standard | 14,266 | $92,536 | 21.5 | 15.5% |
| 25419 | Falling Waters | Standard | 13,201 | $89,284 | 17.3 | 39.6% |
| 25413 | Bunker Hill | Standard | 9,618 | $100,556 | 22.9 | 16.2% |
| 25420 | Gerrardstown | Standard | 4,945 | $98,785 | 28.2 | 22.8% |
| 25421 | Glengary | Standard | 0 | — | 3.2 | — |
| 25402 | Martinsburg | PO Box | — | — | 0.0 | — |
| 25440 | Ridgeway | PO Box | — | — | 0.0 | — |