| ZIP Codes: | 9 ZIP Codes (9 Standard, 0 PO Box, 0 Unique) [See All] |
| Area Codes: | 227 / 240 / 301 |
| Timezone: | Eastern (GMT -05:00) |
| Local Time: | 2:12:28 PM |
| Population: | 26,504 [See All] |
| FIPS: | 24023 |
| Land Area: | 578 sq mi |
| Water Area: | 9 sq mi |
| Coordinates: | 39.5358, -79.2598 |
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26,504 residents live across 9 ZIPs covering 578 sq mi, served by 9 distinct USPS-recognized cities.
Population moved from 27,706 to 26,504 from 2014 to 2024 — a -4.3% change. 3 ZIPs gained residents, 5 lost.
The county's wealthiest ZIP 21541 (Mc Henry, $82,955 median) and poorest ZIP 21523 (Bloomington, $59,063) are 15.6 miles apart — a 1.4× income gap across local geography.
Median home values vary 3.5× across this county — from $98,100 in 21523 (Bloomington) to $342,500 in 21541 (Mc Henry).
Density varies 9× across the county — from 22 people/sq mi in 21561 (Swanton) to 195 in 21523 (Bloomington).
Educational attainment ranges from 10.1% bachelor's+ in 21538 (Kitzmiller) to 40.0% in 21541 (Mc Henry) — the breadth of educational profiles across the area.
Within Maryland, this is the #22 most populous of 24 counties and ranks #23 for median household income .
Weighted by population, the typical household earns about $65,935 across the county — reflecting what a typical resident sees, not a simple ZIP average.
26.6% of adults age 25+ hold a bachelor's degree or higher (5,267 of 19,822 reporting).
9 Standard delivery, 0 PO Box only, 0 single-entity Unique ZIPs serve this county.
A frontier county — vast land area with only a few residents per square mile. Daily life looks very different here than in the country's denser counties.
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 21550 | Oakland | Standard | 13,691 | $64,921 | 207.4 | -5.5% |
| 21536 | Grantsville | Standard | 3,833 | $64,205 | 98.4 | -13.7% |
| 21531 | Friendsville | Standard | 2,487 | $63,750 | 65.0 | 9.1% |
| 21561 | Swanton | Standard | 2,412 | $73,858 | 109.5 | -5.7% |
| 21520 | Accident | Standard | 1,918 | $59,852 | 54.5 | -7.8% |
| 21541 | Mc Henry | Standard | 1,335 | $82,955 | 24.4 | 27.0% |
| 21538 | Kitzmiller | Standard | 678 | $61,250 | 18.1 | 20.0% |
| 21523 | Bloomington | Standard | 150 | $59,063 | 0.8 | -36.4% |
| 21522 | Bittinger | Standard | — | — | 0.0 | — |