ZIP Codes of Jefferson Davis Parish, LA

Population & People
Population & People
Total Population
28,905
Household Income
Household Income
Median Income
$54,254
Housing
Housing
Total Housing Units
13,160
Business & Economy
Business & Economy
Total Businesses
619
Employment
Employment
Employment Rate
53.21%
Education
Education
Bachelor's Degree+
12.56%
Source: U.S. Census ACS 2024 5-Year Estimates · rolled up across the 7 ZIPs in this parish.
Data Last Updated: June 1, 2026
ZIP Codes:7 ZIP Codes (5 Standard, 2 PO Box, 0 Unique) [See All]
Area Code:337
Timezone:Central (GMT -06:00)
Local Time:2:12:24 PM
Population:28,905 [See All]
FIPS:22053
CBSA:Lake Charles, LA
Land Area:594 sq mi
Water Area:13 sq mi
Coordinates:30.2662, -92.8033
Quick Link:
https://www.zip-codes.com/county/la-jefferson-davis.asp
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Louisiana's #34 most populous parish
28,905 residents across 7 ZIPs — #34 of 64 Louisiana counties.

Standout ZIPs in this Parish


Most Populous
Jennings · 15,242 people
52.7% of county total
Highest Income
Welsh · $78,393 median
1.4× county average
Largest Land Area
Welsh · 162.5 sq mi
Spans the most ground
Fastest Growth
Welsh · 11.9% (10-yr)
5,347 → 5,983 residents
Most Educated
Jennings · 13.6% bachelor's+
1,400 of 10,323 adults 25+

Things worth knowing about Jefferson Davis Parish


28,905 residents live across 7 ZIPs covering 594 sq mi, served by 7 distinct USPS-recognized cities.

Population moved from 29,622 to 28,905 from 2014 to 2024 — a -2.4% change. 3 ZIPs gained residents, 4 lost.

The parish's wealthiest ZIP 70591 (Welsh, $78,393 median) and poorest ZIP 70640 (Fenton, $21,938) are 8.6 miles apart — a 3.6× income gap across local geography.

Median home values vary 1.7× across this parish — from $96,600 in 70640 (Fenton) to $163,600 in 70581 (Roanoke).

Density varies 40× across the parish — from 24 people/sq mi in 70532 (Elton) to 951 in 70640 (Fenton).

Educational attainment ranges from 8.0% bachelor's+ in 70640 (Fenton) to 18.5% in 70581 (Roanoke) — the breadth of educational profiles across the area.

Within Louisiana, this is the #34 most populous of 64 parishes and ranks #37 for median household income .

Weighted by population, the typical household earns about $58,159 across the parish — reflecting what a typical resident sees, not a simple ZIP average.

12.6% of adults age 25+ hold a bachelor's degree or higher (2,446 of 19,475 reporting).

5 Standard delivery, 2 PO Box only, 0 single-entity Unique ZIPs serve this parish.

Stories about Jefferson Davis Parish


Two counties in one

Median household income spans 3.6× between the wealthiest and poorest ZIPs — a sign of significant intra-county inequality.

Wealthiest ZIP
Welsh
Median income: $78,393
Population: 5,983
Bachelor's+: 11.0%
vs
Poorest ZIP (pop >= 500)
Fenton
Median income: $21,938
Population: 196
Bachelor's+: 8.0%
For every $1 of household income in 70640, the typical household in 70591 earns $3.57.

Big & sparse

A frontier parish — vast land area with only a few residents per square mile. Daily life looks very different here than in the country's denser counties.

Total area
594
square miles
Avg density
48.7
people per sq mi
Population
28,905
across 7 ZIPs
Welsh
162.5 sq mi
5,983 residents
Jennings
155.9 sq mi
15,242 residents
Lake Arthur
145.0 sq mi
3,874 residents

All ZIP Codes in Jefferson Davis Parish


ZIPCityTypePopulationMedian IncomeArea (sq mi)10-yr Growth
70546JenningsStandard15,242$52,229155.9-6.8%
70591WelshStandard5,983$78,393162.511.9%
70549Lake ArthurStandard3,874$57,692145.0-7.0%
70532EltonStandard2,434$44,095102.00.2%
70581RoanokeStandard958$71,17627.362.4%
70650LacassinePO Box2180.8-49.5%
70640FentonPO Box196$21,9380.2-34.0%

Adjacent & Nearby Counties