| ZIP Codes: | 23 ZIP Codes (14 Standard, 7 PO Box, 2 Unique) [See All] |
| Area Codes: | 227 / 240 / 301 |
| Timezone: | Eastern (GMT -05:00) |
| Local Time: | 2:12:29 PM |
| Population: | 155,449 [See All] |
| FIPS: | 24043 |
| CBSA: | Hagerstown-Martinsburg, MD-WV |
| Land Area: | 461 sq mi |
| Water Area: | 8 sq mi |
| Coordinates: | 39.5922, -77.7408 |
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155,449 residents live across 23 ZIPs covering 461 sq mi, served by 18 distinct USPS-recognized cities.
Population moved from 148,264 to 155,429 from 2014 to 2024 — a +4.8% change. 10 ZIPs gained residents, 7 lost.
The county's wealthiest ZIP 21733 (Fairplay, $109,896 median) and poorest ZIP 21767 (Maugansville, $57,940) are 10.7 miles apart — a 1.9× income gap across local geography.
Median home values vary 2.8× across this county — from $214,100 in 21719 (Cascade) to $608,800 in 21779 (Rohrersville).
Density varies 148× across the county — from 37 people/sq mi in 21711 (Big Pool) to 5,421 in 21746 (Hagerstown).
Educational attainment ranges from 2.5% bachelor's+ in 21746 (Hagerstown) to 37.3% in 21779 (Rohrersville) — the breadth of educational profiles across the area.
Within Maryland, this is the #11 most populous of 24 counties and ranks #16 for median household income .
Weighted by population, the typical household earns about $77,754 across the county — reflecting what a typical resident sees, not a simple ZIP average.
24.0% of adults age 25+ hold a bachelor's degree or higher (26,139 of 108,961 reporting).
14 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 |
|---|---|---|---|---|---|---|
| 21740 | Hagerstown | Standard | 64,792 | $62,873 | 70.8 | 5.2% |
| 21742 | Hagerstown | Standard | 34,069 | $86,288 | 46.2 | 4.7% |
| 21795 | Williamsport | Standard | 10,144 | $87,864 | 34.1 | 10.0% |
| 21783 | Smithsburg | Standard | 9,910 | $100,750 | 48.6 | 9.7% |
| 21713 | Boonsboro | Standard | 9,846 | $96,199 | 39.5 | 7.4% |
| 21722 | Clear Spring | Standard | 6,721 | $88,232 | 58.3 | 21.5% |
| 21782 | Sharpsburg | Standard | 3,704 | $94,130 | 31.9 | -15.2% |
| 21756 | Keedysville | Standard | 3,640 | $101,786 | 23.4 | -1.8% |
| 21750 | Hancock | Standard | 3,417 | $60,625 | 59.6 | -15.1% |
| 21746 | Hagerstown | Unique | 2,361 | — | 0.4 | -23.2% |
| 21779 | Rohrersville | Standard | 1,311 | — | 10.6 | 53.7% |
| 21733 | Fairplay | Standard | 1,275 | $109,896 | 6.8 | 47.7% |
| 21719 | Cascade | Standard | 1,178 | $65,809 | 4.2 | -16.6% |
| 21734 | Funkstown | PO Box | 1,076 | $61,392 | 0.2 | 33.7% |
| 21767 | Maugansville | Standard | 1,031 | $57,940 | 0.3 | -10.2% |
| 21711 | Big Pool | Standard | 929 | $91,250 | 25.3 | 11.0% |
| 21781 | Saint James | PO Box | 25 | — | 0.0 | -73.1% |
| 21715 | Brownsville | PO Box | 20 | — | 0.2 | — |
| 21721 | Chewsville | PO Box | — | — | 0.0 | — |
| 21720 | Cavetown | PO Box | — | — | 0.0 | — |
| 21749 | Hagerstown | Unique | — | — | 0.0 | — |
| 21747 | Hagerstown | PO Box | — | — | 0.0 | — |
| 21741 | Hagerstown | PO Box | — | — | 0.0 | — |