Geismar, LA · standard
ZIP Code 70734
Ascension Parish, Louisiana - Census ACS demographics, housing tenure, and business patterns, benchmarked against every US ZIP.
- 7,554
- 104/sq mi Moderate-density area
- $128,975
- Median income Above-median income area
- $344,100
- Median home value Above-median home value
- 47.5%
- Bachelor's or higher Above-average bachelor's attainment
National ZIP placement
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.
FHFA HPI release change
What changed in the latest House Price Index year
- FHFA House Price Index values in ZIP 70734 (Geismar, LA) fell -7.6% from 2023 to 2024. The all-transactions index moved from 196.8 in 2023 to 181.9 in 2024 (2000 = 100).
ZIP code 70734 is a mid-sized community (a standard USPS delivery area) in Geismar, Ascension Parish, 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 average Louisiana ZIP), while per-capita income is $46,646. Both reported hardship measures are comparatively low in absolute terms: poverty is 5.7% and unemployment is 2.7%. Housing is both higher-cost and owner-heavy: median home value is $344,100 (94% above the average Louisiana ZIP), while 81.4% of occupied homes are owner-occupied and median rent is $850.
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. The page also surfaces 8 ZIP codes within roughly 10 miles and 6 more in Ascension Parish, so 70734 can be compared with both its immediate and county-level context.
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.
- Wholesale trade
Wholesale trade
39 establishments
- Professional, scientific, and technical services
Professional, scientific, and technical services
33 establishments
- Transportation and warehousing
Transportation and warehousing
31 establishments
- Construction
Construction
26 establishments
- Manufacturing
Manufacturing
26 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, 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
Who lives in ZIP 70734?
33.5
Median Age
49.6%
Male
50.4%
Female
4.9%
Foreign-Born
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 ZIP avg
$46,646
Per Capita Income
5.7%
Poverty Rate
2.7%
Unemployment Rate
27.6 min
Mean Commute Time
How ZIP 70734 ranks among Louisiana ZIPs
Geismar, LA household income vs. every Louisiana ZIP code
Median household income among 457 reporting Louisiana ZIPs (this ZIP's population is too small for a reliable national-corpus placement)
$128,975 Top 1% higher than 99% of 457 Louisiana ZIPs
Each bar is a $20K-wide band; taller bars hold more Louisiana 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?
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
What does housing look like?
Housing stock: occupied vs vacant
3,051housing units
3,051
Total Housing Units
2,857
Occupied Units
194
Vacant Units
3.22
Avg Household Size
Occupancy Type
$344,100
Median Home Value
+94% vs state ZIP avg
$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.
- 70737
Gonzales (70737)
38,643 residents
- 70810
Baton Rouge (70810)
37,980 residents
- 70769
Prairieville (70769)
36,084 residents
- 70346 10,925
Donaldsonville (70346)
10,925 residents
- 70734 7,554
Geismar (70734)
7,554 residents
- 70776 6,043
Saint Gabriel (70776)
6,043 residents
- 70778 2,291
Sorrento (70778)
2,291 residents
- 70725 1,826
Darrow (70725)
1,826 residents
- 70721 701
Carville (70721)
701 residents
What this shows Among its immediate neighbors, ZIP 70734 ranks #5 by population - useful context the national average alone can't give.
ZIP 70734 vs its nearest neighbors, by median income
Median household income of this ZIP and the closest reporting ZIP codes within ~10 miles.
- 70734
Geismar (70734)
$128,975 median income
- 70769
Prairieville (70769)
$109,404 median income
- 70778
Sorrento (70778)
$101,967 median income
- 70776
Saint Gabriel (70776)
$96,843 median income
- 70810
Baton Rouge (70810)
$92,098 median income
- 70737
Gonzales (70737)
$82,521 median income
- 70346 $35,280
Donaldsonville (70346)
$35,280 median income
- 70721 $2,499
Carville (70721)
$2,499 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.
| 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 |
Nationwide ZIPs with similar ACS profiles
Two Census-derived peer sets for ZIP 70734, both outside LA so the neighborhoods are not geographic containment (Nearby and same-county blocks stay local).
Similar population
Nearest cross-state ZIPs by resident population (7,554 here; floor ≥1,000).
Similar median household income
Nearest cross-state ZIPs by ACS median household income.
More ZIP Codes in Ascension Parish
Related Areas
Frequently Asked Questions
What parish is ZIP code 70734 in?
ZIP code 70734 (Geismar) is located in Ascension Parish, Louisiana. Ascension Parish 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.
Related
Take this with you
What to do with ZIP 70734's numbers, next.
- See how ZIP 70734 compares to a neighboring ZIP code on the same Census fields Compare this ZIP
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ZIP Code Tabulation Areas (ZCTAs) are Census Bureau approximations of USPS ZIP codes; figures describe the ZCTA area, not any single address within it.