Williamsport Maryland ZIP Codes
Williamsport holds a single ZIP code.
Every ZIP code in Williamsport
| ZIP code | County |
|---|---|
| 21795 | Washington County |
We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP. USPS delivery-type products are licensed, and no clean-rights source maps ZIP codes to neighbourhoods — so the Williamsport codes above are listed without a column we would have to invent.
Scope every ZIP code recorded for Williamsport. Source GeoNames US postal codes (2026-07 postal dump) and Census 2024 county Gazetteer (2024 Gazetteer). Updated . ZIP codes are delivery-route groupings, not areas; the boundaries implied by any ZIP map are approximations.
How these codes cluster
Every Williamsport ZIP code begins 217. Those first three digits identify the sectional center facility that processes mail for this part of Maryland. Statewide that range covers 66 ZIP codes, so Williamsport accounts for 2% of it.
Every Maryland ZIP prefix and the region it covers →
Area codes covering Williamsport
ZIP codes and area codes are separate systems — one routes mail, the other routes calls — and they do not share boundaries. The codes below serve the same ground Williamsport occupies.
Williamsport Maryland area codes in full →
Where Williamsport's ZIP codes sit
- Reference points and footprint
- Not an official NANPA boundary
- Not a USPS delivery area
Cities near Williamsport
| City | Distance | ZIP codes |
|---|---|---|
| Hagerstown Maryland ZIP codes | 5.9 mi | 6 ZIP codes |
| Funkstown Maryland ZIP codes | 6.0 mi | 1 ZIP code |
| Clear Spring Maryland ZIP codes | 7.2 mi | 1 ZIP code |
| Keedysville Maryland ZIP codes | 10 mi | 1 ZIP code |
| Boonsboro Maryland ZIP codes | 10 mi | 1 ZIP code |
| Sharpsburg Maryland ZIP codes | 10 mi | 1 ZIP code |
| Smithsburg Maryland ZIP codes | 13 mi | 1 ZIP code |
| Myersville Maryland ZIP codes | 15 mi | 1 ZIP code |
Straight-line distance between place reference points, not driving distance.