PlainZIP

Geismar, LA · standard

ZIP Code 70734

Ascension County, Louisiana - Census ACS demographics, housing tenure, and business patterns, benchmarked against every US ZIP.

7,554
104/sq mi
$128,975
Median income
$344,100
Median home value
47.5%
Bachelor's or higher

The verdict

Geismar pairs a top-decile household income with above-median home values, in a rural, homeowner-dominated area.

Top 7%
household income, US ZIPs
Top 27%
home value, US ZIPs
104
people per sq mi
81%
owner-occupied homes

Source: U.S. Census Bureau ACS 5-Year Estimates (2019–2023). Percentiles rank ZIP 70734 against every reporting US ZIP.

ZIP code 70734 is a mid-sized community (a standard USPS delivery area) in Geismar, Ascension County, Louisiana, home to 7,554 residents across 72.5 square miles, a density of 104 people per square mile, in the Chicago time zone.

ZIP 70734 skews affluent, with a median household income of $128,975 (116% above the Louisiana average), while per-capita income is $46,646. 5.7% of residents live below the poverty line, and the unemployment rate reads 2.7%. On housing, the median home value is $344,100 (94% above the state average) with median rent at $850 per month, and 81.4% of occupied units are owner-occupied.

A solid share of residents have a four-year degree: 47.5% of adults hold a bachelor's degree or higher, the median age is 33.5, and the average commute is 28 minutes. Beyond these figures, 8 nearby ZIP codes within about 10 miles are surfaced below, along with 6 more sharing Ascension County, letting you compare 70734 to its immediate surroundings rather than a national baseline alone.

Every figure on this page is sourced from the U.S. Census Bureau American Community Survey 5-Year Estimates (including median rent) and the FHFA House Price Index, no estimates, no proprietary scoring. Verify with Census →

Top industries in ZIP 70734

Top 5 sectors by establishment count in Geismar, LA

Which industries have the most business establishments in ZIP 70734.

establishments

What this shows Establishment counts come from the Census ZIP Code Business Patterns program, which counts physical business locations rather than employees or revenue.

Source U.S. Census Bureau · ZIP Code Business Patterns (ZBP) As of 2023

Source: U.S. Census Bureau, American Community Survey 5-Year Estimates + ZIP Code Business Patterns + FHFA HPI ACS demographics and median rent, ZBP business establishments, FHFA HPI for ZIP 70734, Geismar, LA · 2023 Census ACS 5-Year Estimates use a rolling 60-month sample for stable small-geography estimates; ZBP updated annually; FHFA HPI updated quarterly/annually.

Quick Facts

7,554

Population

72.5

Area (sq mi)

104

People / sq mi

Chicago

Time Zone

standard

ZIP Type

Neighborhood Scorecard
Get an A-F grade across income, safety, housing, rent, education, commute, and childcare for this ZIP code.
View Scorecard →

Who lives in ZIP 70734?

33.5

Median Age

49.6%

Male

50.4%

Female

4.9%

Foreign-Born

White 53.0%
African American 23.0%
Asian 3.6%
American Indian or Alaska Native 0.2%
Native Hawaiian or Pacific Islander 0.0%
Two or More Ethnicities 14.6%
Hispanic or Latino 19.6%

Hispanic or Latino is an ethnicity category from the Census Bureau and may overlap with other categories above.

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

How much do residents earn?

$128,975

Median Household Income

+116% vs state

$46,646

Per Capita Income

5.7%

Poverty Rate

2.7%

Unemployment Rate

27.6 min

Mean Commute Time

How ZIP 70734 ranks nationally

Geismar, LA household income vs. every US ZIP code

Median household income, the full national distribution, with this ZIP marked

$128,975 Top 7% higher than 93% of 30,318 US ZIPs

$0–$20,000: 118 US ZIPs (0%). Below this entry. $20,000–$40,000: 1,573 US ZIPs (5%). Below this entry. $40,000–$60,000: 7,092 US ZIPs (23%). Below this entry. $60,000–$80,000: 9,980 US ZIPs (33%). Below this entry. $80,000–$100,000: 5,778 US ZIPs (19%). Below this entry. $100,000–$120,000: 2,855 US ZIPs (9%). Below this entry. $120,000–$140,000: 1,362 US ZIPs (4%). This entry sits in this band. $140,000–$160,000: 686 US ZIPs (2%). Above this entry. $160,000–$180,000: 364 US ZIPs (1%). Above this entry. $180,000–$200,000: 186 US ZIPs (1%). Above this entry. $200,000–$220,000: 324 US ZIPs (1%). Above this entry. This ZIP $0 $200K+ every reporting US ZIP, bucketed by value

Each bar is a $20K-wide band; taller bars hold more US ZIPs. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

Source U.S. Census Bureau, ACS 5-Year Estimates · 2019–2023

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

What is the education profile here?

High School Graduate or Higher 64.9%
Bachelor's Degree or Higher 47.5%

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

What does housing look like?

3,051

Total Housing Units

2,857

Occupied Units

194

Vacant Units

3.22

Avg Household Size

Occupancy Type

Owner 81.4%
Renter 18.6%

$344,100

Median Home Value

+94% vs state

$850

Median Rent

2005

Median Year Built

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

How have home values changed over time?

FHFA House Price Index, annual appreciation data based on repeat sales and appraisals

-7.6%

YoY Change (2024)

182

HPI Index (2000 = 100)

+82%

Total Change Since 2000

Home values in ZIP 70734 have decreased 7.6% over the past year (2024). Since 2000, this ZIP has seen +82% cumulative appreciation.

Year Annual Change HPI Index
2020 +3.4% 148
2021 +6.0% 157
2022 -2.3% 153
2023 +28.5% 197
2024 -7.6% 182

Source: Federal Housing Finance Agency (FHFA) House Price Index, All-Transactions, Five-Digit ZIP Codes (Developmental Index). Index base = 100 in year 2000. Data through 2024. ZIP codes with few transactions may show missing values.

What businesses operate in this ZIP?

Census Bureau data shows 261 business establishments in ZIP 70734, employing approximately 9,694 people with a combined annual payroll of $1,060,221,000.

261

Businesses

9,694

Employees

$1.1B

Annual Payroll

13

Industry Sectors

Industry Establishments % of Total
Wholesale trade 39 14.9%
Professional, scientific, and technical services 33 12.6%
Transportation and warehousing 31 11.9%
Construction 26 10.0%
Manufacturing 26 10.0%
Real estate and rental and leasing 25 9.6%
Retail trade 15 5.8%
Accommodation and food services 15 5.8%
Administrative and support and waste management and remediation services 12 4.6%
Other services (except public administration) 12 4.6%
Health care and social assistance 10 3.8%
Finance and insurance 6 2.3%
Mining, quarrying, and oil and gas extraction 4 1.5%

Source: U.S. Census Bureau, ZIP Code Business Patterns (ZBP), 2023. Employment figures may include noise for disclosure avoidance.

Nearby ZIP Codes

Want a side-by-side? Compare 70734 vs 70721 →

ZIP 70734 vs its nearest neighbors, by population

Resident population of this ZIP and the closest reporting ZIP codes within ~10 miles.

residents

What this shows Among its immediate neighbors, ZIP 70734 ranks #5 by population - useful context the national average alone can't give.

Source U.S. Census Bureau · ACS 5-Year Estimates As of 2019–2023

ZIP 70734 vs its nearest neighbors, by median income

Median household income of this ZIP and the closest reporting ZIP codes within ~10 miles.

median income

What this shows By household income, ZIP 70734 ranks the highest of 8 neighboring ZIPs, local affluence varies block to block, not just metro to metro.

Source U.S. Census Bureau · ACS 5-Year Estimates As of 2019–2023
ZIP Code City Population Distance
70721 Carville, LA 701 5.2 mi
70737 Gonzales, LA 38,643 5.0 mi
70346 Donaldsonville, LA 10,925 5.8 mi
70725 Darrow, LA 1,826 5.6 mi
70776 Saint Gabriel, LA 6,043 6.7 mi
70769 Prairieville, LA 36,084 8.1 mi
70778 Sorrento, LA 2,291 9.1 mi
70810 Baton Rouge, LA 37,980 11.0 mi

More ZIP Codes in Ascension County

70737 standard
Gonzales, LA
Pop: 38,643
70769 standard
Prairieville, LA
Pop: 36,084
70346 standard
Donaldsonville, LA
Pop: 10,925
70774 standard
Saint Amant, LA
Pop: 10,076
70778 standard
Sorrento, LA
Pop: 2,291
70725 standard
Darrow, LA
Pop: 1,826

Related Areas

Ascension County Geismar, LA Louisiana

Frequently Asked Questions

What county is ZIP code 70734 in? ▼
ZIP code 70734 (Geismar) is located in Ascension County, Louisiana. Ascension County contains multiple ZIP codes, see the full list at /counties/ascension-la.
What is the population of ZIP code 70734? ▼
ZIP code 70734 in Geismar, LA has a population of 7,554 according to the Census Bureau ACS 2023 estimates.
What is the median household income in ZIP 70734? ▼
The median household income in ZIP 70734 is $128,975, which is 69% above the national average of $76,288.
What is the average home value in ZIP 70734? ▼
The median home value in ZIP 70734 is $344,100, which is 24% above the national average of $278,155.
What is the demographic makeup of ZIP 70734? ▼
The largest racial group in ZIP 70734 is White at 53.0%. Hispanic or Latino residents make up 19.6% of the population.
How many businesses are in ZIP code 70734? ▼
ZIP code 70734 has 261 business establishments employing approximately 9,694 people, according to Census Bureau ZIP Code Business Patterns (ZBP) 2023 data.
What are the main industries in ZIP code 70734? ▼
The top industries by establishment count in ZIP 70734 are: Wholesale trade (39), Professional, scientific, and technical services (33), Transportation and warehousing (31). There are 13 industry sectors represented in total.
How have home values changed in ZIP code 70734? ▼
According to the FHFA House Price Index, home values in ZIP 70734 decreased by 7.6% in 2024. Since 2000, home values in this ZIP have appreciated by approximately 82%. This is a developmental index based on repeat sales and appraisal data from Fannie Mae and Freddie Mac.
What is the education level in ZIP code 70734? ▼
In ZIP code 70734, 64.9% of residents aged 25+ have a high school diploma or higher, and 47.5% hold a bachelor's degree or higher. These figures come from the Census Bureau ACS 5-Year Estimates (2023).
What is the average commute time in ZIP 70734? ▼
The mean commute time for workers in ZIP code 70734 is 27.6 minutes according to Census ACS data. The national average is roughly 26 minutes, so commuters here spend more time traveling to work than typical.
What percentage of residents own vs. rent in ZIP 70734? ▼
In ZIP code 70734, approximately 81.4% of occupied housing units are owner-occupied and 18.6% are renter-occupied, based on Census ACS 2023 data.
What is the poverty rate in ZIP code 70734? ▼
The poverty rate in ZIP code 70734 is 5.7% according to Census Bureau ACS 2023 estimates. This measures the percentage of the population living below the federal poverty threshold.

Read our methodology to see how this data is sourced, computed, and verified.