Donaldsonville ZIP Code List — Ascension County, LA

There is one unique ZIP code in Donaldsonville, Louisiana and it is 70346. Area code: 225.

ZIP codes

64.92

sq mi land

4.88

sq mi water

225

area code

Donaldsonville, LA ZIP code map

About Donaldsonville, LA

Donaldsonville, Louisiana, is a distinctive city located in Ascension County. Known for its rich history and vibrant culture, it attracts both residents and visitors alike. With its unique blend of Southern charm and historical significance, Donaldsonville offers a welcoming community atmosphere.

Location & geography

This city is positioned strategically along the banks of the Mississippi River, making it a vital part of Louisiana's natural landscape. Nearby cities include Gonzales, located approximately 10 miles to the southeast, and Baton Rouge, about 25 miles to the north. Donaldsonville encompasses a total area of 64.92 square miles, of which 4.88 square miles is water.

Community & economy

Donaldsonville boasts a tight-knit community that takes pride in its heritage and local traditions. The area is predominantly characterized by agricultural industries, with farming and related activities playing a key role in daily life. Residents and local businesses actively participate in community events, celebrating their cultural history and fostering strong interconnectedness.

Transportation

Access to Donaldsonville is facilitated by major highways, including U.S. Route 61, which runs north-south through the city, providing direct routes to larger urban areas. The nearest airport is Baton Rouge Metropolitan Airport, approximately 25 miles away, offering both domestic and limited international flights. Public transportation options may be limited, but the city's roadways support local travel easily.

History

Donaldsonville was founded in the early 19th century and has grown to be a key location for agricultural industries in Louisiana. Over the years, it has seen notable events, including its role as a major staging area during the Civil War. The city's rich history is preserved in various historical sites throughout the area, showcasing its unique contributions to the region.

Did you know?

A surprising fact about Donaldsonville is that it was once the state capital of Louisiana for a brief period in the 19th century. Additionally, the city is known for its annual Sugar Festival, which celebrates the local sugarcane industry and its cultural significance.

ZIP codes for Donaldsonville, LA (1)

ZIP code	City	County	Map
70346	Donaldsonville	Ascension	View map

Demographics & statistics

9,347

Population

35.7

Median age

$29,220

Median household income

$22,037

Per capita income

$162,200

Median home value

$736

Median monthly rent

64.5%

Home ownership

38.2%

Poverty rate

12.4%

Unemployment

2,887

Housing units

12.4%

Bachelor's or higher

Age distribution

Male Female

514

Under 5

558

222

5–9

242

328

10–14

356

294

15–19

320

185

20–24

201

628

25–34

682

475

35–44

517

418

45–54

454

239

55–59

260

292

60–64

318

536

65–74

582

197

75–84

214

151

85+

164

← Male

Female →

Age summary

Group	Count	%
Under 18	2,673	28.6%
18 and over	6,674	71.4%
65 and over	1,844	19.7%
Median age	35.7 years

Race & ethnicity

Black or African American 71.5%

White 24.9%

Two or more races 1.8%

Hispanic or Latino 0.8%

Asian 0.6%

Other race 0.4%

Native Hawaiian / Pacific Islander 0.1%

Group	Count	%
Black or African American	6,734	71.5%
White	2,342	24.9%
Two or more races	174	1.8%
Hispanic or Latino	75	0.8%
Asian	55	0.6%
Other race	36	0.4%
Native Hawaiian / Pacific Islander	6	0.1%

Household income

Under $10k 11.1%

$10k–$15k 13.1%

$15k–$25k 20.5%

$25k–$35k 10.4%

$35k–$50k 6.5%

$50k–$75k 12.6%

$75k–$100k 7.3%

$100k–$150k 12.0%

$150k–$200k 4.2%

$200k+ 2.4%

Range	% of households
Under $10k	11.1%
$10k–$15k	13.1%
$15k–$25k	20.5%
$25k–$35k	10.4%
$35k–$50k	6.5%
$50k–$75k	12.6%
$75k–$100k	7.3%
$100k–$150k	12.0%
$150k–$200k	4.2%
$200k+	2.4%
Median income	$29,220

Housing

Home values

Under $50k 11.0%

$50k–$100k 13.4%

$100k–$150k 17.0%

$150k–$200k 21.0%

$200k–$300k 26.9%

$300k–$500k 8.7%

$500k–$1M 1.9%

Housing overview

Metric	Value
Median home value	$162,200
Median rent / month	$736
Owner occupied	64.5%
Renter occupied	35.5%
Vacant	15.0%
Single-family detached	63.1%
Large apartment buildings	1.3%
Mobile homes	17.4%
Median rooms	5.1
Avg household size (owned)	2.44

Year built

Era	%
2020 or later	0.0%
2010–2019	7.1%
2000–2009	12.4%
1990–1999	8.6%
1980–1989	19.4%
1970–1979	15.0%
1960–1969	13.4%
1950–1959	15.1%
1940–1949	5.0%
1939 or earlier	3.9%

Bedrooms

Size	% of units
No bedroom (studio)	2.0%
1 bedroom	5.6%
2 bedrooms	31.1%
3 bedrooms	47.1%
4 bedrooms	10.8%
5+ bedrooms	3.3%

Vehicles per household

Vehicles	% of households
No vehicle	20.6%
1 vehicle	38.5%
2 vehicles	23.8%
3 or more	17.1%

Heating fuel

Fuel type	%
Utility gas	31.7%
Electricity	64.2%
Propane / LP gas	1.3%
Wood	0.7%
No fuel used	2.1%

Households & families

Household type	Count	%
Married-couple family	1,125	32.0%
Cohabiting couple	196	5.6%
Male householder, no spouse	567	16.1%
Female householder, no spouse	1,627	46.3%
Households with children under 18	1,056	30.0%
Households with seniors (65+)	1,328	37.8%
Average household size	2.50

Marital status

Status	Male	Female
Never married	44.2%	32.8%
Married	38.6%	37.1%
Separated	2.3%	1.5%
Widowed	3.4%	16.1%
Divorced	11.5%	12.5%

Education

Less than 9th grade 2.6%

Some HS, no diploma 12.4%

HS graduate 46.1%

Some college, no degree 18.7%

Associate's degree 7.8%

Bachelor's degree 8.8%

Graduate / professional 3.6%

Metric	%
HS diploma or higher	85.0%
Bachelor's or higher	12.4%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	302	13.6%
Kindergarten	105	4.7%
Elementary school	947	42.6%
High school	384	17.3%
College / grad school	483	21.7%

Employment

Industry of employment

Education & healthcare 28.6%

Arts, food & hospitality 14.0%

Retail trade 10.6%

Public administration 9.2%

Manufacturing 8.5%

Construction 7.4%

Professional & management 6.8%

Finance & real estate 5.9%

Information 3.1%

Transportation & utilities 2.7%

Other services 2.3%

Agriculture & mining 0.7%

Occupation

Category	%
Management, business & arts	24.9%
Service	28.2%
Sales & office	16.5%
Natural resources & construction	10.0%
Production & transportation	20.5%

Employment type

Type	%
Private sector	73.7%
Government	21.7%
Self-employed	3.0%
Unpaid family workers	1.6%

Commute

Method	%
Drive alone	73.5%
Carpool	20.7%
Public transit	0.0%
Walk	4.3%
Other means	0.0%
Avg commute (minutes)	22.7

Poverty

All people 38.2%

Under 18 years 68.1%

18 and over 25.3%

Married-couple families 15.5%

Female-led households 58.1%

Income support

Source	% of households
Social Security	46.1%
Retirement income	22.4%
Supplemental Security	7.6%
Cash public assistance	10.2%
Food stamps / SNAP	27.9%

Health indicators

Condition	%
High blood pressure	47.1%
High cholesterol	36.3%
Heart disease	8.2%
Stroke	5.2%
Asthma	10.9%
Arthritis	28.2%
Kidney disease	4.2%
Pulmonary disease	9.5%
Cancer	5.8%

Behavior / access	%
Binge drinking	16.4%
No physical activity	39.7%
Less than 7 hrs sleep	42.5%
Fair or poor health	26.9%
Poor mental health	19.3%
Poor physical health	15.6%
No health insurance	18.4%
Visited doctor (checkup)	82.6%
Visited dentist	44.6%
Cholesterol screening	88.7%
Teeth loss	27.3%

Veterans & disability

Veterans	Count	%
Civilian veterans	408	6.1%

Disability	%
Any disability	16.2%
Under 18	4.3%
18–64 years	15.6%
65 and over	35.5%

Health insurance coverage

Type	%
Private insurance	42.6%
Public insurance	60.1%
Uninsured under 19	0.0%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	8,275	88.5%
Spanish	45	0.5%
Other Indo-European	17	0.2%
Asian & Pacific Islander	11	0.1%
Other languages	17	0.2%

Place of birth & citizenship

Origin	Count	%
Native born (US)	9,274	99.2%
Born in same state	9,268	99.2%
Born in different state	8,829	94.5%
Foreign born	6	0.1%
Naturalized citizen	73	0.8%
Not a US citizen	55	75.3%

Ancestry

Ancestry	Count	%
Arab	630	6.7%
Italian	140	1.5%
German	132	1.4%

Ancestry	Count	%
French	82	0.9%
English	7	0.1%

Technology access

Metric	% of households
Computer access	37.6%
Internet access	85.8%

Source: U.S. Census Bureau, American Community Survey 2025 estimates.

Frequently asked questions

What is the ZIP code for Donaldsonville, LA?

Donaldsonville, LA has one ZIP code: 70346.

What is the main ZIP code for Donaldsonville, LA?

The primary ZIP code for Donaldsonville, LA is 70346. The city uses area code 225 for phone service.

What county is Donaldsonville, LA in?

Donaldsonville is located in Ascension County, Louisiana.

How many ZIP codes are in Donaldsonville, LA?

Donaldsonville, LA has 1 ZIP code.

What is the ZIP code for Downtown Donaldsonville and the historic riverfront district along the Mississippi River?

Downtown Donaldsonville and the historic riverfront area are located in ZIP code 70346, which serves as the main commercial and historical center of this Ascension Parish city.

What ZIP code covers the Donaldsonville area near the Ascension Parish Courthouse and City Hall?

The Ascension Parish Courthouse and City Hall of Donaldsonville are both located in ZIP code 70346, the primary ZIP code serving the city's governmental and civic institutions.