Harrison County ZIP Codes

Harrison County is a county of Mississippi.

ZIP codes: 16
Cities & towns: 6
Area codes: 1
Land area: 574 sq mi

Every ZIP code in Harrison County

395xx

The complete list of Harrison County, MS ZIP codes with the city each one delivers to.
ZIP code	City
39501	Gulfport
39502	Gulfport
39503	Gulfport
39505	Gulfport
39506	Gulfport
39507	Gulfport
39530	Biloxi
39531	Biloxi
39532	Biloxi
39533	Biloxi
39534	Biloxi
39535	Biloxi
39540	Diberville
39560	Long Beach
39571	Pass Christian
39574	Saucier

We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP.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 Harrison County codes above are listed without a column we would have to invent.

Cities and towns in Harrison County

A further 1 place in Harrison County appears in the postal source without a page of its own; its codes are in the table above and each one links to its own page.

Area codes covering Harrison County

Telephone and postal boundaries are drawn by different bodies, so these codes overlap the county without matching its edges.

228 Area code 228

Where Harrison County's ZIP codes sit

Each point is the reference point of one Harrison County ZIP code, plotted from its record coordinates. The outline is the convex envelope of those points — a footprint, not a boundary.

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

Scope every ZIP code recorded in Harrison County. Source GeoNames US postal codes (2026-07 postal dump), Census 2024 county Gazetteer (2024 Gazetteer) and geoinfo-dataset (full_dataset) ZIP→NPA (2018 snapshot). Updated 16 July 2026. The outline is a convex envelope of ZIP reference points, not a jurisdiction boundary.