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US ZIP Code Profile

ZIP Code 70057
Hahnville, Louisiana

ZIP code 70057 is in Hahnville, located in Saint Charles County, Louisiana, within the New Orleans-Metairie metro area. Its 2020 Census population was 4,201. The estimated median adjusted gross income per tax return is $43,478, and about 4% of filers report $200,000 or more.

2020 Population
4,201
Census ZCTA
County
Saint Charles
FIPS 22089
Median income (est.)
$43,478
IRS SOI 2022
Land Area
38.487 mi²
+ 0.52 mi² water

01Location & Geography

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

Primary CityHahnville, LA
CountySaint Charles County (FIPS 22089)
StateLouisiana (FIPS 22)
Metro Area (MSA)New Orleans-Metairie, LA Metro Area (35380)
Census Region / DivisionSouth Region · West South Central Division
Coordinates29.962198, -90.464195
Land / Water Area38.487 mi² land · 0.52 mi² water

02Income & Economics

Distribution of the 1,820 individual tax returns filed in 70057 by adjusted gross income bracket (IRS SOI, 2022).

< $25K
31.3%
$25K–$50K
25.3%
$50K–$75K
14.3%
$75K–$100K
8.2%
$100K–$200K
16.5%
$200K+
4.4%
The $200,000+ bracket accounts for 23% of 70057's total adjusted gross income, from 4% of returns — a concentration that drives the gap between the median ($43,478) 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 70057's IRS income metrics, 2020–2022.

Median income (2021→2022)
$43,478
▲ 4.9%
Filers earning $200K+
4.4%
▼ 0.2 pt
Total filers
1,820
▲ 3.4%
GET /zipc/v2/zipcodes/70057/soi?year=… $36K 2020 $41K 2021 $43K 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 70057 ZCTA.

2000
2,792
 
2010
4,719
▲ +69.0%
2020
4,201
▼ -11.0%

05USPS Postal Details

Delivery and facility attributes from the monthly USPS dataset.

ZIP ClassificationNon-Unique Zip
Facility TypePost Office
Carrier Route SortC
USPS Finance Number213926
City AliasesHahnville, Killona

06Frequently Asked Questions

What county is ZIP code 70057 in?

ZIP code 70057 is in Saint Charles County, Louisiana (county FIPS code 22089).

What city is ZIP code 70057?

The primary USPS city for 70057 is Hahnville, LA.

What metro area (MSA) is 70057 in?

70057 is part of the New Orleans-Metairie, LA Metro Area (MSA code 35380).

What is the population of ZIP code 70057?

The 2020 Census population of 70057 was 4,201 residents.

What is the median income in ZIP code 70057?

Based on IRS Statistics of Income data, the estimated median adjusted gross income per tax return in 70057 is about $43,478, 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.