| ZIP Codes: | 9 ZIP Codes (9 Standard, 0 PO Box, 0 Unique) [See All] |
| Area Codes: | 410 / 443 / 667 |
| Timezone: | Eastern (GMT -05:00) |
| Local Time: | 2:12:28 PM |
| Population: | 24,362 [See All] |
| FIPS: | 24029 |
| Land Area: | 365 sq mi |
| Water Area: | 51 sq mi |
| Coordinates: | 39.2802, -76.0036 |
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24,362 residents live across 9 ZIPs covering 365 sq mi, served by 9 distinct USPS-recognized cities.
Population moved from 24,930 to 24,362 from 2014 to 2024 — a -2.3% change. 4 ZIPs gained residents, 5 lost.
The county's wealthiest ZIP 21635 (Galena, $101,618 median) and poorest ZIP 21667 (Still Pond, $64,122) are 9.8 miles apart — a 1.6× income gap across local geography.
Median home values vary 2.0× across this county — from $205,600 in 21667 (Still Pond) to $402,000 in 21635 (Galena).
Density varies 18× across the county — from 21 people/sq mi in 21645 (Kennedyville) to 366 in 21610 (Betterton).
Educational attainment ranges from 8.9% bachelor's+ in 21667 (Still Pond) to 45.8% in 21620 (Chestertown) — the breadth of educational profiles across the area.
Within Maryland, this is the #23 most populous of 24 counties and ranks #17 for median household income .
Weighted by population, the typical household earns about $82,283 across the county — reflecting what a typical resident sees, not a simple ZIP average.
38.7% of adults age 25+ hold a bachelor's degree or higher (6,784 of 17,550 reporting).
9 Standard delivery, 0 PO Box only, 0 single-entity Unique ZIPs serve this county.
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 21620 | Chestertown | Standard | 13,810 | $80,530 | 137.7 | 11.3% |
| 21661 | Rock Hall | Standard | 2,613 | $90,492 | 49.4 | -4.0% |
| 21651 | Millington | Standard | 2,290 | $74,063 | 38.7 | -31.9% |
| 21635 | Galena | Standard | 2,085 | $101,618 | 38.1 | -7.4% |
| 21678 | Worton | Standard | 1,658 | $71,023 | 39.5 | -33.5% |
| 21645 | Kennedyville | Standard | 959 | $86,118 | 46.1 | -6.7% |
| 21610 | Betterton | Standard | 391 | $86,250 | 1.1 | 16.0% |
| 21667 | Still Pond | Standard | 291 | $64,122 | 7.4 | 21.8% |
| 21650 | Massey | Standard | 265 | — | 7.5 | 201.1% |