Geismar ZIP Codes — Ascension County, LA

There is one unique ZIP code in Geismar, Louisiana and it is 70734. Area code: 225.
1
ZIP codes
27.75
sq mi land
0.50
sq mi water
225
area code
Geismar, LA ZIP code map

About Geismar, LA

Geismar is a charming city located in Louisiana, specifically within Ascension County. Known for its close-knit community and regional significance, it is a place where Louisiana's culture and southern hospitality thrive. Visitors and residents alike appreciate the unique blend of residential comfort and local industry.

Location & geography

Geismar is strategically situated near several notable cities, with Gonzales located just 5 miles to the east and Baton Rouge approximately 20 miles to the north. The city covers a total land area of 27.75 square miles, alongside an additional 0.50 square miles of water area. The terrain is primarily flat, characteristic of the region, making it accessible and ideal for various local enterprises.

Community & economy

The community in Geismar is characterized by its friendly atmosphere and a strong sense of local pride. Industries in the area include manufacturing and processing, contributing to both the local economy and employment. Daily life in Geismar is influenced by traditional Louisiana culture, with opportunities for engaging in local events and recreational activities.

Transportation

Geismar is served by several key transportation routes, including Interstate 10 and U.S. Highway 61, facilitating travel throughout the region. The nearest major airport is Baton Rouge Metropolitan Airport, located approximately 20 miles to the north. Public transit options are limited, but the roadways provide ease of commuting for residents.

History

Geismar was established as part of the expansion of the industrial sector in Louisiana during the mid-20th century. The city has since fostered several key industries, including chemical manufacturing, which play a significant role in the local economy. Notable events in its history include the growth spurred by the nearby petrochemical plants and a strong community response during significant weather events.

Did you know?

One surprising fact about Geismar is its rapid growth due to the industrial developments that began in the late 20th century, transforming it into a hub for chemical production. Additionally, Geismar is part of the Baton Rouge metropolitan area, which provides residents with access to urban amenities while retaining a more rural lifestyle.

ZIP codes for Geismar, LA (1)
ZIP code City County Map
70734 Geismar Ascension View map

Demographics & statistics

9,775
Population
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
85
75–84
85
17
85+
16
← Male
Female →

Age summary

GroupCount%
Under 182,93930.1%
18 and over6,83669.9%
65 and over4604.7%
Median age34.8 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%
GroupCount%
White6,29456%
Black or African American1,70615.2%
Hispanic or Latino1,45813%
Two or more races9768.7%
Other race5024.5%
Asian2972.6%

Household income

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 $10k0.3%
$15k–$25k3.5%
$25k–$35k6.2%
$35k–$50k5.4%
$50k–$75k8.1%
$75k–$100k14.3%
$100k–$150k24.0%
$150k–$200k13.7%
$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

MetricValue
Median home value$287,400
Median rent / month$1,398
Owner occupied81.3%
Renter occupied18.7%
Vacant2.4%
Single-family detached80.1%
Large apartment buildings0.0%
Mobile homes19.5%
Median rooms6.6
Avg household size (owned)3.32

Year built

Era%
2020 or later1.7%
2010–201929.5%
2000–200950.6%
1990–19994.3%
1980–19893.2%
1970–19798.0%
1960–19690.5%
1950–19591.5%
1940–19490.0%
1939 or earlier0.8%

Bedrooms

Size% of units
No bedroom (studio)0.0%
1 bedroom0.0%
2 bedrooms3.2%
3 bedrooms41.4%
4 bedrooms50.9%
5+ bedrooms4.5%

Vehicles per household

Vehicles% of households
No vehicle2.2%
1 vehicle6.3%
2 vehicles64.2%
3 or more27.2%

Heating fuel

Fuel type%
Utility gas42.9%
Electricity56.6%
Propane / LP gas0.5%

Households & families

Household typeCount%
Married-couple family2,33278.9%
Cohabiting couple2217.5%
Male householder, no spouse1254.2%
Female householder, no spouse2789.4%
Households with children under 181,54652.3%
Households with seniors (65+)33411.3%
Average household size3.31

Marital status

StatusMaleFemale
Never married24.6%20.9%
Married67.5%67.7%
Separated0.6%4.1%
Widowed0.6%3.4%
Divorced6.6%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 higher91.8%
Bachelor's or higher50.3%

School enrollment (ages 3–17)

TypeCount%
Nursery / preschool1133.9%
Kindergarten2498.5%
Elementary school1,38547.5%
High school62721.5%
College / grad school54318.6%

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 & arts51.4%
Service5.9%
Sales & office23.1%
Natural resources & construction10.0%
Production & transportation9.6%

Employment type

Type%
Private sector83.8%
Government10.8%
Self-employed5.5%
Unpaid family workers0.0%

Commute

Method%
Drive alone81.0%
Carpool4.6%
Public transit0.0%
Walk0.2%
Other means0.0%
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 Security9.9%
Retirement income15.2%
Supplemental Security5.2%
Cash public assistance3.0%
Food stamps / SNAP3.4%

Health indicators

Condition%
High blood pressure30.2%
High cholesterol30.2%
Heart disease3.8%
Stroke2.0%
Asthma8.3%
Arthritis17.6%
Kidney disease2.0%
Pulmonary disease4.1%
Cancer4.4%
Behavior / access%
Binge drinking23.7%
No physical activity22.9%
Less than 7 hrs sleep36.3%
Fair or poor health11.4%
Poor mental health16.4%
Poor physical health8.2%
No health insurance11.3%
Visited doctor (checkup)76.9%
Visited dentist64.5%
Cholesterol screening90.2%
Teeth loss11.6%

Veterans & disability

VeteransCount%
Civilian veterans3505.2%
Disability%
Any disability9.9%
Under 185.3%
18–64 years9.9%
65 and over38.0%

Health insurance coverage

Type%
Private insurance82.8%
Public insurance19.8%
Uninsured under 193.7%

Language & origin

Language spoken at home (age 5+)

LanguageCount%
English only9,14493.5%
Spanish3013.3%
Other Indo-European3013.3%
Asian & Pacific Islander00.0%
Other languages00.0%

Place of birth & citizenship

OriginCount%
Native born (US)9,30595.2%
Born in same state9,18494.0%
Born in different state6,72868.8%
Foreign born1211.2%
Naturalized citizen4704.8%
Not a US citizen10823.0%

Ancestry

AncestryCount%
German7067.2%
Arab5085.2%
French4624.7%
AncestryCount%
Italian3924%
Polish720.7%
Irish230.2%

Technology access

Metric% of households
Computer access30.2%
Internet access97.4%

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

Frequently asked questions
What ZIP codes does Geismar, LA have?
Geismar, LA has one ZIP code: 70734. Each ZIP code serves a distinct delivery area within the city and surrounding region.
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