70734 ZIP Code — Geismar, LA

Ascension County, Louisiana

ZIP code 70734 is located in Geismar, Louisiana, within Ascension County. It covers approximately 27.75 square miles and serves a population of 9,775 residents. This is a standard ZIP code in the Central (CT) timezone, served by area code 225.

About ZIP code 70734

The housing stock consists of predominantly single-family detached homes. Most homes were built in the 2000s, giving the area an established character. Median home value is $287,400. Owner-occupancy is high at 81%, well above the national average.

Median household income is $124,205.

The dominant occupation class is management, business, and professional, with education and healthcare as the leading industry. The average commute of 28 minutes is near the national average.

Educational attainment is high — 50% of residents hold a bachelor's degree or higher, well above the national average of 33%.

Overall, ZIP code 70734 reflects a community defined by a highly educated population and high homeownership.

9,775

population

27.75

sq mi land

Standard

ZIP type

Central (CT)

timezone

70734 ZIP code map

Cities in ZIP code 70734

Below are the cities the US Postal Service accepts for ZIP code 70734. Using any city not on this list may result in mail delivery delays.

City	Status
Geismar	Preferred

Nearby ZIP codes

70725 Darrow (5.2 mi) 70737 Gonzales (5.2 mi) 70721 Carville (5.6 mi) 70346 Donaldsonville (5.6 mi) 70776 Saint Gabriel (5.7 mi) 70769 Prairieville (8.2 mi) 70778 Sorrento (9.5 mi) 70810 Baton Rouge (11 mi) 70788 White Castle (11.2 mi) 70780 Sunshine (11.7 mi) 70817 Baton Rouge (12.1 mi) 70341 Belle Rose (12.3 mi)

Demographics updated 05/2026

Population
Total population	9,775
Population density	352 / sq mi
State FIPS	22
County FIPS	005

Geography
Land area	27.75 sq mi
Water area	0.50 sq mi
Latitude	30.2070
Longitude	-91.0090
Timezone	Central (CT)
Area code	225

Total population by age

Gender

Race & ethnicity

Economics updated 05/2026

Household income

Income range	This ZIP	County avg	State avg
Under $50k	17.4%	30.1%	49.2%
$50k – $100k	30.4%	29.4%	27.7%
$100k – $200k	38.2%	32.1%	18.3%
Over $200k	14.0%	8.4%	4.7%

Demographics & statistics

9,775

Population

352

People per sq mi

34.8

Median age

$124,205

Median household income

$45,375

Per capita income

$287,400

Median home value

$1,398

Median monthly rent

81.3%

Home ownership

7.7%

Poverty rate

0.8%

Unemployment

2,475

Housing units

50.3%

Bachelor's or higher

Age distribution

Male Female

317

Under 5

314

368

5–9

364

520

10–14

515

444

15–19

440

299

20–24

296

528

25–34

524

997

35–44

989

828

45–54

820

205

55–59

204

172

60–64

171

129

65–74

128

75–84

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	2,939	30.1%
18 and over	6,836	69.9%
65 and over	460	4.7%
Median age	34.8 years

Race & ethnicity

White 56%

Black or African American 15.2%

Hispanic or Latino 13%

Two or more races 8.7%

Other race 4.5%

Asian 2.6%

Group	Count	%
White	6,294	56%
Black or African American	1,706	15.2%
Hispanic or Latino	1,458	13%
Two or more races	976	8.7%
Other race	502	4.5%
Asian	297	2.6%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	17.4%	30.1%	49.2%
$50k – $100k	30.4%	29.4%	27.7%
$100k – $200k	38.2%	32.1%	18.3%
Over $200k	14.0%	8.4%	4.7%

Under $10k 0.3%

$15k–$25k 3.5%

$25k–$35k 6.2%

$35k–$50k 5.4%

$50k–$75k 8.1%

$75k–$100k 14.3%

$100k–$150k 24.0%

$150k–$200k 13.7%

$200k+ 24.4%

Range	% of households
Under $10k	0.3%
$15k–$25k	3.5%
$25k–$35k	6.2%
$35k–$50k	5.4%
$50k–$75k	8.1%
$75k–$100k	14.3%
$100k–$150k	24.0%
$150k–$200k	13.7%
$200k+	24.4%
Median income	$124,205

Housing

Home values

Under $50k 6.4%

$50k–$100k 2.8%

$100k–$150k 4.8%

$150k–$200k 1.1%

$200k–$300k 38.7%

$300k–$500k 33.6%

$500k–$1M 12.7%

Housing overview

Metric	Value
Median home value	$287,400
Median rent / month	$1,398
Owner occupied	81.3%
Renter occupied	18.7%
Vacant	2.4%
Single-family detached	80.1%
Large apartment buildings	0.0%
Mobile homes	19.5%
Median rooms	6.6
Avg household size (owned)	3.32

Year built

Era	%
2020 or later	1.7%
2010–2019	29.5%
2000–2009	50.6%
1990–1999	4.3%
1980–1989	3.2%
1970–1979	8.0%
1960–1969	0.5%
1950–1959	1.5%
1940–1949	0.0%
1939 or earlier	0.8%

Bedrooms

Size	% of units
No bedroom (studio)	0.0%
1 bedroom	0.0%
2 bedrooms	3.2%
3 bedrooms	41.4%
4 bedrooms	50.9%
5+ bedrooms	4.5%

Vehicles per household

Vehicles	% of households
No vehicle	2.2%
1 vehicle	6.3%
2 vehicles	64.2%
3 or more	27.2%

Heating fuel

Fuel type	%
Utility gas	42.9%
Electricity	56.6%
Propane / LP gas	0.5%

Households & families

Household type	Count	%
Married-couple family	2,332	78.9%
Cohabiting couple	221	7.5%
Male householder, no spouse	125	4.2%
Female householder, no spouse	278	9.4%
Households with children under 18	1,546	52.3%
Households with seniors (65+)	334	11.3%
Average household size	3.31

Marital status

Status	Male	Female
Never married	24.6%	20.9%
Married	67.5%	67.7%
Separated	0.6%	4.1%
Widowed	0.6%	3.4%
Divorced	6.6%	4.0%

Education

Less than 9th grade 4.5%

Some HS, no diploma 3.6%

HS graduate 16.7%

Some college, no degree 16.2%

Associate's degree 8.7%

Bachelor's degree 37.0%

Graduate / professional 13.3%

Metric	%
HS diploma or higher	91.8%
Bachelor's or higher	50.3%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	113	3.9%
Kindergarten	249	8.5%
Elementary school	1,385	47.5%
High school	627	21.5%
College / grad school	543	18.6%

Employment

Industry of employment

Education & healthcare 24.2%

Manufacturing 16.7%

Retail trade 16.4%

Construction 11.5%

Professional & management 7.7%

Transportation & utilities 6.7%

Finance & real estate 5.6%

Other services 4.0%

Arts, food & hospitality 2.4%

Wholesale trade 1.8%

Information 1.6%

Public administration 1.3%

Occupation

Category	%
Management, business & arts	51.4%
Service	5.9%
Sales & office	23.1%
Natural resources & construction	10.0%
Production & transportation	9.6%

Employment type

Type	%
Private sector	83.8%
Government	10.8%
Self-employed	5.5%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	81.0%
Carpool	4.6%
Public transit	0.0%
Walk	0.2%
Work from home	14.3%
Other means	0.0%
Avg commute (minutes)	27.6

Poverty

All people 7.7%

Under 18 years 12.5%

18 and over 5.7%

Married-couple families 6.7%

Female-led households 3.7%

Income support

Source	% of households
Social Security	9.9%
Retirement income	15.2%
Supplemental Security	5.2%
Cash public assistance	3.0%
Food stamps / SNAP	3.4%

Health indicators

Condition	%
Obesity	31.2%
High blood pressure	30.2%
High cholesterol	30.2%
Diabetes	8.0%
Heart disease	3.8%
Stroke	2.0%
Asthma	8.3%
Arthritis	17.6%
Kidney disease	2.0%
Pulmonary disease	4.1%
Cancer	4.4%

Behavior / access	%
Smoking	17.6%
Binge drinking	23.7%
No physical activity	22.9%
Less than 7 hrs sleep	36.3%
Depression	23.9%
Fair or poor health	11.4%
Poor mental health	16.4%
Poor physical health	8.2%
No health insurance	11.3%
Visited doctor (checkup)	76.9%
Visited dentist	64.5%
Cholesterol screening	90.2%
Teeth loss	11.6%

Veterans & disability

Veterans	Count	%
Civilian veterans	350	5.2%

Disability	%
Any disability	9.9%
Under 18	5.3%
18–64 years	9.9%
65 and over	38.0%

Health insurance coverage

Type	%
Private insurance	82.8%
Public insurance	19.8%
No insurance	4.3%
Uninsured under 19	3.7%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	9,144	93.5%
Spanish	301	3.3%
Other Indo-European	301	3.3%
Asian & Pacific Islander	0	0.0%
Other languages	0	0.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	9,305	95.2%
Born in same state	9,184	94.0%
Born in different state	6,728	68.8%
Foreign born	121	1.2%
Naturalized citizen	470	4.8%
Not a US citizen	108	23.0%

Ancestry

Ancestry	Count	%
German	706	7.2%
Arab	508	5.2%
French	462	4.7%

Ancestry	Count	%
Italian	392	4%
Polish	72	0.7%
Irish	23	0.2%

Technology access

Metric	% of households
Computer access	30.2%
Internet access	97.4%

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

Frequently asked questions about ZIP code 70734

What city is ZIP code 70734 in?

ZIP code 70734 is primarily assigned to Geismar, Louisiana.

What county is ZIP code 70734 in?

ZIP code 70734 falls within Ascension County, Louisiana.

Is ZIP code 70734 family-oriented?

30% of residents in ZIP code 70734 are under 18, reflecting a younger, family-oriented community.

How educated is the population of ZIP code 70734?

50% of residents hold a bachelor's degree or higher — well above the national average of ~33%, reflecting a highly educated population.

Is ZIP code 70734 mostly owner-occupied?

81% of occupied units in ZIP code 70734 are owner-occupied, well above the national average.

What is the median household income in ZIP code 70734?

The median household income in ZIP code 70734 is $124,205, above the national median of ~$75,000.

What timezone is ZIP code 70734 in?

ZIP code 70734 observes the CST timezone.