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US ZIP Code Profile

ZIP Code 70549
Lake Arthur, Louisiana

ZIP code 70549 is in Lake Arthur, located in Jefferson Davis County, Louisiana, within the Jennings metro area. Its 2020 Census population was 3,836. The estimated median adjusted gross income per tax return is $41,429, and about 4% of filers report $200,000 or more.

2020 Population
3,836
Census ZCTA
County
Jefferson Davis
FIPS 22053
Median income (est.)
$41,429
IRS SOI 2022
Land Area
117.634 mi²
+ 7.461 mi² water

01Location & Geography

Authoritative geographic identifiers from the U.S. Census Bureau, ANSI, and FIPS standards.

Primary CityLake Arthur, LA
CountyJefferson Davis County (FIPS 22053)
StateLouisiana (FIPS 22)
Metro Area (MSA)Jennings, LA Micro Area (27660)
Census Region / DivisionSouth Region · West South Central Division
Coordinates30.069149, -92.8047
Land / Water Area117.634 mi² land · 7.461 mi² water

02Income & Economics

Distribution of the 1,480 individual tax returns filed in 70549 by adjusted gross income bracket (IRS SOI, 2022).

< $25K
34.5%
$25K–$50K
23.6%
$50K–$75K
14.9%
$75K–$100K
8.8%
$100K–$200K
14.2%
$200K+
4.0%
The $200,000+ bracket accounts for 22% of 70549's total adjusted gross income, from 4% of returns — a concentration that drives the gap between the median ($41,429) and the average.
Estimated median = median adjusted gross income per tax return, interpolated from IRS SOI brackets. Differs from U.S. Census household income.

03Income Over Time

Year-over-year change in 70549's IRS income metrics, 2020–2022.

Median income (2021→2022)
$41,429
▲ 17.0%
Filers earning $200K+
4.0%
▲ 0.8 pt
Total filers
1,480
▼ 2.6%
GET /zipc/v2/zipcodes/70549/soi?year=… $33K 2020 $35K 2021 $41K 2022
Median = adjusted gross income per return, interpolated from IRS SOI brackets. Figures are nominal (not inflation-adjusted).

04Population Trend

Decennial U.S. Census population for the 70549 ZCTA.

2000
4,269
 
2010
3,948
▼ -7.5%
2020
3,836
▼ -2.8%

05USPS Postal Details

Delivery and facility attributes from the monthly USPS dataset.

ZIP ClassificationNon-Unique Zip
Facility TypePost Office
Carrier Route SortC
USPS Finance Number215044
City AliasesLake Arthur

06Frequently Asked Questions

What county is ZIP code 70549 in?

ZIP code 70549 is in Jefferson Davis County, Louisiana (county FIPS code 22053).

What city is ZIP code 70549?

The primary USPS city for 70549 is Lake Arthur, LA.

What metro area (MSA) is 70549 in?

70549 is part of the Jennings, LA Micro Area (MSA code 27660).

What is the population of ZIP code 70549?

The 2020 Census population of 70549 was 3,836 residents.

What is the median income in ZIP code 70549?

Based on IRS Statistics of Income data, the estimated median adjusted gross income per tax return in 70549 is about $41,429, with around 4% of filers reporting $200,000 or more. Note that adjusted gross income is a tax measure and differs from U.S. Census household income.