First three digits · Louisiana
ZIP Codes Starting with
38 ZIP codes start with 703, sorted at the New Orleans, LA (SCF 700) sectional center (USPS labeling list L005, effective October 1, 2026) in Louisiana: 34 residential ZIP codes across 6 counties and 4 PO Box or single-organization codes (Census 2020 ZCTAs and GeoNames postal codes, October 2026).
What do the digits 703 mean?
The first digit, 7, is one of ten national areas (Arkansas, Louisiana, Oklahoma and Texas). The first three, 703, route mail to a sectional center: USPS labeling list L005 (effective October 1, 2026) sends letters for 703 to the New Orleans, LA (SCF 700) facility. The last two digits pick the delivery area. By residents, the largest town names among the 703 ZIP codes are Houma, Thibodaux, Morgan City, Raceland, Gray and Donaldsonville.
The same facility sorts 4 prefixes, 210 ZIP codes in all: 700, 701, 703, 704.
Where are the 703 ZIP codes?
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).
All ZIP codes starting with 703
| County | ||||||
|---|---|---|---|---|---|---|
| 70301 | Thibodaux | Lafourche Parish | 50,095 | 177 | $58k | $218k |
| 70302 | Thibodaux | Lafourche Parish | PO Box or unique | – | – | – |
| 70310 | Thibodaux | Lafourche Parish | 327 | 1,730 | – | – |
| 70339 | Pierre Part | Assumption Parish | 4,848 | 88 | $52k | $171k |
| 70340 | Amelia | St. Mary Parish | no residents | 0 | – | – |
| 70341 | Belle Rose | Assumption Parish | 3,690 | 82 | $35k | $89k |
| 70342 | Berwick | St. Mary Parish | 4,607 | 617 | $52k | $212k |
| 70343 | Bourg | Lafourche Parish | 5,280 | 231 | $74k | $204k |
| 70344 | Chauvin | Terrebonne Parish | 4,724 | 93 | $52k | $111k |
| 70345 | Cut Off | Lafourche Parish | 8,344 | 65 | $62k | $165k |
| 70346 | Donaldsonville | Ascension Parish | 9,927 | 153 | $35k | $177k |
| 70352 | Donner | Terrebonne Parish | 167 | 43 | – | – |
| 70353 | Dulac | Terrebonne Parish | 442 | 23 | $36k | $107k |
| 70354 | Galliano | Lafourche Parish | 3,404 | 50 | $49k | $112k |
| 70355 | Gheens | Lafourche Parish | 957 | 9 | $56k | $103k |
| 70356 | Gibson | Terrebonne Parish | 1,495 | 22 | $33k | $176k |
| 70357 | Golden Meadow | Lafourche Parish | 2,351 | 13 | $71k | $133k |
| 70358 | Grand Isle | Jefferson Parish | 623 | 96 | – | $270k |
| 70359 | Gray | Terrebonne Parish | 10,038 | 697 | $56k | $153k |
| 70360 | Houma | Terrebonne Parish | 28,574 | 475 | $85k | $286k |
| 70361 | Houma | Terrebonne Parish | PO Box or unique | – | – | – |
| 70363 | Houma | Terrebonne Parish | 24,127 | 308 | $47k | $147k |
| 70364 | Houma | Terrebonne Parish | 28,716 | 681 | $69k | $192k |
| 70371 | Kraemer | Lafourche Parish | PO Box or unique | – | – | – |
| 70372 | Labadieville | Assumption Parish | 1,968 | 68 | $41k | $105k |
| 70373 | Larose | Lafourche Parish | 5,539 | 101 | $87k | $171k |
| 70374 | Lockport | Lafourche Parish | 5,872 | 133 | $71k | $180k |
| 70375 | Mathews | Lafourche Parish | 178 | 24 | – | – |
| 70377 | Montegut | Terrebonne Parish | 3,056 | 36 | $61k | $131k |
| 70380 | Morgan City | Assumption Parish | 20,529 | 264 | $55k | $142k |
| 70381 | Morgan City | St. Mary Parish | PO Box or unique | – | – | – |
| 70390 | Napoleonville | Assumption Parish | 7,160 | 48 | $59k | $163k |
| 70391 | Paincourtville | Assumption Parish | no residents | 0 | – | – |
| 70392 | Patterson | St. Mary Parish | 8,173 | 222 | $58k | $159k |
| 70393 | Plattenville | Assumption Parish | 117 | 21 | $19k | $215k |
| 70394 | Raceland | Lafourche Parish | 13,395 | 160 | $64k | $200k |
| 70395 | Schriever | Terrebonne Parish | 4,420 | 90 | $79k | $197k |
| 70397 | Theriot | Terrebonne Parish | 971 | 14 | $116k | $171k |
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; GeoNames postal codes (CC BY 4.0) for codes without a residential area.