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US ZIP Code Profile

ZIP Code 70346
Donaldsonville, Louisiana

ZIP code 70346 is in Donaldsonville, located in Ascension County, Louisiana, within the Baton Rouge metro area. Its 2020 Census population was 10,342. The estimated median adjusted gross income per tax return is $31,306, and about 2% of filers report $200,000 or more.

2020 Population
10,342
Census ZCTA
County
Ascension
FIPS 22005
Median income (est.)
$31,306
IRS SOI 2022
Land Area
51.46 mi²
+ 4.851 mi² water

01Location & Geography

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

Primary CityDonaldsonville, LA
CountyAscension County (FIPS 22005)
StateLouisiana (FIPS 22)
Metro Area (MSA)Baton Rouge, LA Metro Area (12940)
Census Region / DivisionSouth Region · West South Central Division
Coordinates30.152885, -91.01187
Land / Water Area51.46 mi² land · 4.851 mi² water

02Income & Economics

Distribution of the 4,200 individual tax returns filed in 70346 by adjusted gross income bracket (IRS SOI, 2022).

< $25K
43.3%
$25K–$50K
26.4%
$50K–$75K
11.7%
$75K–$100K
6.7%
$100K–$200K
9.5%
$200K+
2.4%
The $200,000+ bracket accounts for 26% of 70346's total adjusted gross income, from 2% of returns — a concentration that drives the gap between the median ($31,306) 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 70346's IRS income metrics, 2020–2022.

Median income (2021→2022)
$31,306
▲ 9.5%
Filers earning $200K+
2.4%
▲ 0.1 pt
Total filers
4,200
▼ 2.6%
GET /zipc/v2/zipcodes/70346/soi?year=… $29K 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 70346 ZCTA.

2000
10,809
 
2010
10,925
▲ +1.1%
2020
10,342
▼ -5.3%

05USPS Postal Details

Delivery and facility attributes from the monthly USPS dataset.

ZIP ClassificationNon-Unique Zip
Facility TypePost Office
Carrier Route SortD
USPS Finance Number212353
City AliasesDonaldsonville, Donaldsonvlle, Mccall, Modeste

06Frequently Asked Questions

What county is ZIP code 70346 in?

ZIP code 70346 is in Ascension County, Louisiana (county FIPS code 22005).

What city is ZIP code 70346?

The primary USPS city for 70346 is Donaldsonville, LA.

What metro area (MSA) is 70346 in?

70346 is part of the Baton Rouge, LA Metro Area (MSA code 12940).

What is the population of ZIP code 70346?

The 2020 Census population of 70346 was 10,342 residents.

What is the median income in ZIP code 70346?

Based on IRS Statistics of Income data, the estimated median adjusted gross income per tax return in 70346 is about $31,306, 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.