ZIP Code 21711

21711 is one of Maryland's ZIP codes, delivering to addresses in Big Pool, Washington County.

City: Big Pool
County: Washington County
State: Maryland
Prefix: 217xx

Where this code sits

21711 is part of the 217xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Big Pool.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 21711 delivers to without sharing its boundary.

ZIP codes nearest 21711

The ZIP codes whose reference points sit closest to 21711.
ZIP code	Distance	Delivers to
ZIP code 21722	5.7 mi	Clear Spring, MD
ZIP code 25419	7.8 mi	Falling Waters, WV
ZIP code 25403	8.7 mi	Martinsburg, WV
ZIP code 21750	9.6 mi	Hancock, MD
ZIP code 25427	9.6 mi	Hedgesville, WV
ZIP code 21795	11 mi	Williamsport, MD
ZIP code 25411	11 mi	Berkeley Springs, WV
ZIP code 17212	12 mi	Big Cove Tannery, PA

Straight-line distance between place reference points, not driving distance. Where a place has no Census Gazetteer point, its postal centroid is used instead.

Each point is the reference point for 21711, plotted from its record coordinates.

Reference points and footprint
Not an official NANPA boundary
Not a USPS delivery area

Scope ZIP code 21711. Source GeoNames US postal codes (2026-07 postal dump) and Census 2024 county Gazetteer (2024 Gazetteer). Updated 15 July 2026. A ZIP code is a set of delivery routes, not an area; the point shown is a record coordinate, not a centre.