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US ZIP Code Profile

ZIP Code 70538
Franklin, Louisiana

ZIP code 70538 is in Franklin, located in Saint Mary County, Louisiana, within the Morgan City metro area. Its 2020 Census population was 12,604. The estimated median adjusted gross income per tax return is $30,589, and about 2% of filers report $200,000 or more.

2020 Population
12,604
Census ZCTA
County
Saint Mary
FIPS 22101
Median income (est.)
$30,589
IRS SOI 2022
Land Area
155.042 mi²
+ 13.017 mi² water

01Location & Geography

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

Primary CityFranklin, LA
CountySaint Mary County (FIPS 22101)
StateLouisiana (FIPS 22)
Metro Area (MSA)Morgan City, LA Micro Area (34020)
Census Region / DivisionSouth Region · West South Central Division
Coordinates29.805552, -91.49835
Land / Water Area155.042 mi² land · 13.017 mi² water

02Income & Economics

Distribution of the 4,910 individual tax returns filed in 70538 by adjusted gross income bracket (IRS SOI, 2022).

< $25K
44.4%
$25K–$50K
25.1%
$50K–$75K
11.8%
$75K–$100K
7.5%
$100K–$200K
9.2%
$200K+
2.0%
The $200,000+ bracket accounts for 18% of 70538's total adjusted gross income, from 2% of returns — a concentration that drives the gap between the median ($30,589) 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 70538's IRS income metrics, 2020–2022.

Median income (2021→2022)
$30,589
▲ 6.6%
Filers earning $200K+
2.0%
▼ 0.2 pt
Total filers
4,910
▼ 1.8%
GET /zipc/v2/zipcodes/70538/soi?year=… $28K 2020 $29K 2021 $31K 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 70538 ZCTA.

2000
15,960
 
2010
14,844
▼ -7.0%
2020
12,604
▼ -15.1%

05USPS Postal Details

Delivery and facility attributes from the monthly USPS dataset.

ZIP ClassificationNon-Unique Zip
Facility TypePost Office
Carrier Route SortD
USPS Finance Number213185
City AliasesFranklin, Cypremort Point, Cypremort Pt

06Frequently Asked Questions

What county is ZIP code 70538 in?

ZIP code 70538 is in Saint Mary County, Louisiana (county FIPS code 22101).

What city is ZIP code 70538?

The primary USPS city for 70538 is Franklin, LA.

What metro area (MSA) is 70538 in?

70538 is part of the Morgan City, LA Micro Area (MSA code 34020).

What is the population of ZIP code 70538?

The 2020 Census population of 70538 was 12,604 residents.

What is the median income in ZIP code 70538?

Based on IRS Statistics of Income data, the estimated median adjusted gross income per tax return in 70538 is about $30,589, with around 2% of filers reporting $200,000 or more. Note that adjusted gross income is a tax measure and differs from U.S. Census household income.