Louisiana ZIP codes
Louisiana holds 719 ZIP codes between 70001 and 71497. The tables rank the places and counties with the most codes; the guide below decodes the numbering.
Places with the most ZIP codes in Louisiana
| Place | ZIP codes |
|---|---|
| New Orleans | 61 |
| Baton Rouge | 42 |
| Shreveport | 35 |
| Metairie | 12 |
| Lafayette | 12 |
| Lake Charles | 11 |
| Monroe | 10 |
| Alexandria | 7 |
| Bossier City | 5 |
| Kenner | 5 |
| Slidell | 5 |
| Hammond | 4 |
| Houma | 4 |
| Sulphur | 3 |
| New Iberia | 3 |
| Gretna | 3 |
| Thibodaux | 3 |
| Ruston | 3 |
| Denham Springs | 3 |
| Natchitoches | 3 |
Louisiana counties by ZIP count
| County | ZIP codes |
|---|---|
| Orleans | 56 |
| Caddo Parish | 47 |
| East Baton Rouge Parish | 47 |
| Jefferson Parish | 34 |
| Rapides | 30 |
| Calcasieu | 21 |
| St. Tammany | 20 |
| Lafayette | 18 |
| Natchitoches | 17 |
| Ouachita Parish | 17 |
Reading a Louisiana ZIP code
Louisiana holds 719 ZIP codes between 70001 and 71497, spread over 64 counties. New Orleans leads the state with 61 codes, ahead of Baton Rouge with 42. Every code here opens with the digit 7: that opening number is the national postal region Louisiana belongs to, the next two digits name the sectional center that sorts the mail, and the final two point to the local office. A ZIP+4 suffix narrows delivery to a block face. Boundaries follow carrier routes rather than city limits, which is why New Orleans spreads across 61 codes while some rural codes cross county lines.
Source: GeoNames postal dataset (CC BY 4.0), snapshot of 2026-07-09. Counts cover standard delivery ZIPs listed for Louisiana; unique and PO box codes may add to these totals.
Last updated: · Methodology and sources