St. Tammany Parish ZIP Codes

St. Tammany Parish is a parish of Louisiana.

ZIP codes: 20
Cities & towns: 12
Area codes: 2
Land area: 845 sq mi

Every ZIP code in St. Tammany Parish

704xx

The complete list of St. Tammany Parish, LA ZIP codes with the city each one delivers to.
ZIP code	City
70420	Abita Springs
70431	Bush
70433	Covington
70434	Covington
70435	Covington
70437	Folsom
70445	Lacombe
70447	Madisonville
70448	Mandeville
70452	Pearl River
70457	Saint Benedict
70458	Slidell
70459	Slidell
70460	Slidell
70461	Slidell
70463	Sun
70464	Talisheek
70469	Slidell
70470	Mandeville
70471	Mandeville

We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP.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

Cities and towns in St. Tammany Parish

A further 4 places in St. Tammany Parish appear in the postal source without a page of its own; their codes are in the table above and each one links to its own page.

Area codes covering St. Tammany Parish

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

Where St. Tammany Parish's ZIP codes sit

Each point is the reference point of one St. Tammany Parish 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 St. Tammany Parish. 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.