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US ZIP Code Profile

ZIP Code 70374
Lockport, Louisiana

ZIP code 70374 is in Lockport, located in Lafourche County, Louisiana, within the Houma-Thibodaux metro area. Its 2020 Census population was 6,699. The estimated median adjusted gross income per tax return is $46,205, and about 3% of filers report $200,000 or more.

2020 Population
6,699
Census ZCTA
County
Lafourche
FIPS 22057
Median income (est.)
$46,205
IRS SOI 2022
Land Area
49.393 mi²
+ 2.507 mi² water

01Location & Geography

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

Primary CityLockport, LA
CountyLafourche County (FIPS 22057)
StateLouisiana (FIPS 22)
Metro Area (MSA)Houma-Thibodaux, LA Metro Area (26380)
Census Region / DivisionSouth Region · West South Central Division
Coordinates29.604507, -90.50199
Land / Water Area49.393 mi² land · 2.507 mi² water

02Income & Economics

Distribution of the 2,610 individual tax returns filed in 70374 by adjusted gross income bracket (IRS SOI, 2022).

< $25K
31.8%
$25K–$50K
21.5%
$50K–$75K
15.7%
$75K–$100K
11.9%
$100K–$200K
16.1%
$200K+
3.1%
The $200,000+ bracket accounts for 18% of 70374's total adjusted gross income, from 3% of returns — a concentration that drives the gap between the median ($46,205) 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 70374's IRS income metrics, 2020–2022.

Median income (2021→2022)
$46,205
▲ 10.5%
Filers earning $200K+
3.1%
▼ 0.0 pt
Total filers
2,610
▲ 2.0%
GET /zipc/v2/zipcodes/70374/soi?year=… $39K 2020 $42K 2021 $46K 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 70374 ZCTA.

2000
10,032
 
2010
7,125
▼ -29.0%
2020
6,699
▼ -6.0%

05USPS Postal Details

Delivery and facility attributes from the monthly USPS dataset.

ZIP ClassificationNon-Unique Zip
Facility TypePost Office
Carrier Route SortD
USPS Finance Number215486
City AliasesLockport

06Frequently Asked Questions

What county is ZIP code 70374 in?

ZIP code 70374 is in Lafourche County, Louisiana (county FIPS code 22057).

What city is ZIP code 70374?

The primary USPS city for 70374 is Lockport, LA.

What metro area (MSA) is 70374 in?

70374 is part of the Houma-Thibodaux, LA Metro Area (MSA code 26380).

What is the population of ZIP code 70374?

The 2020 Census population of 70374 was 6,699 residents.

What is the median income in ZIP code 70374?

Based on IRS Statistics of Income data, the estimated median adjusted gross income per tax return in 70374 is about $46,205, with around 3% of filers reporting $200,000 or more. Note that adjusted gross income is a tax measure and differs from U.S. Census household income.