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U.S. ZIP Codes Database 2026

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Allegany County ZIP Codes

Browse all ZIP Codes, cities, and associated area codes registered in Allegany County.

County State ZIP Code City Area Codes
Allegany County MD 21501 Cumberland 240
Allegany County MD 21502 Cumberland 227, 240, 301, 304, 582, 681, 814
Allegany County MD 21503 Cumberland 240
Allegany County MD 21504 Cumberland 240
Allegany County MD 21505 Cumberland 240
Allegany County MD 21521 Barton 227, 240, 301
Allegany County MD 21524 Corriganville 227, 240, 301, 582, 814
Allegany County MD 21528 Eckhart Mines 240
Allegany County MD 21529 Ellerslie 227, 240, 301, 582, 814
Allegany County MD 21530 Flintstone 227, 240, 301, 582, 814
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About U.S. ZIP Codes

ZIP codes are a United States Postal Service system introduced in 1963 to make mail routing more accurate and efficient. The standard format uses five digits, while ZIP+4 adds four more digits for a more precise delivery segment.

ZIP codes cover the United States, its territories, military mail routes, and other USPS delivery points. This directory organizes that data for practical lookup by ZIP code, city, county, and state.