70346 ZIP Code, Donaldsonville, LA
70346 is a ZIP code in Donaldsonville, Louisiana — mostly in Ascension Parish (79% of its land), with smaller parts in Assumption Parish County. It covers 65 square miles of land. The closest ZIP codes are 70725, 70341 and 70734. 9,927 people live here in 3,680 households. With about 153 people per square mile it is lightly settled, and owners and renters are mixed (55% own). Median household income is $35,280, well below the Louisiana median of $60,756.
Quick facts
- Mailing city: Donaldsonville, LA
- County: Ascension County
- Land area: 65 sq mi
- Population: 9,927
- Median household income: $35,280
- Carrier routes: 7 (4,068 homes)
Key figures
| Measure | Value |
|---|---|
| Residents | 9,927 |
| Households | 3,680 |
| Median household income | $35,280 |
| Income per person | $22,826 |
| Median age | 35 |
| Homeowners | 55.4% |
| Median home value | $176,900 |
| Median rent | $856 |
| Bachelor's degree or higher | 11.6% |
| Average commute (minutes) | 26.7 |
| Households with kids under 18 | 38.7% |
| Moved in the past year | 12.9% |
| Below the poverty line | 35.3% |
| Broadband internet | 84.3% |
| Speak a non-English language at home | 4.5% |
Household income
| % of households | Value |
|---|---|
| <$10K | 5.8% |
| $10–15K | 10.4% |
| $15–25K | 26.4% |
| $25–35K | 7.0% |
| $35–50K | 8.5% |
| $50–75K | 16.4% |
| $75–100K | 7.7% |
| $100–150K | 11.7% |
| $150–200K | 4.0% |
| $200K+ | 2.0% |
Age
| % of all residents | Value |
|---|---|
| <10 | 15.5% |
| 10–19 | 12.8% |
| 20–24 | 7.4% |
| 25–34 | 14.3% |
| 35–44 | 13.6% |
| 45–54 | 6.7% |
| 55–64 | 10.2% |
| 65–74 | 12.2% |
| 75+ | 7.3% |
Tenure
| % of housing units | Value |
|---|---|
| Owned, with mortgage | 15.9% |
| Owned outright | 30.7% |
| Rented | 37.1% |
| Vacant | 16.3% |
Type of building
| % of housing units | Value |
|---|---|
| Detached house | 56.8% |
| Townhome | 0.7% |
| 2–4 units | 11.3% |
| 5–19 units | 10.0% |
| 20+ units | 1.4% |
| Mobile / other | 19.9% |
Businesses in 70346
178 business establishments with 2,691 employees (ZIP Codes Business Patterns 2023).
- Retail Trade: 43
- Health Care and Social Assistance: 22
- Accommodation and Food Services: 22
- Professional, Scientific, and Technical Services: 20
- Finance and Insurance: 16
- Other Services (except Public Administration): 15
- Wholesale Trade: 11
- Construction: 6
EDDM carrier routes
70346 has 7 USPS carrier routes with 4,068 residential and 273 business mailboxes. Open the EDDM route map.
Carrier routes in 70346
70346 has 7 USPS carrier routes (3 city (C), 4 rural (R)) with 4,068 residential and 273 business mailboxes. Routes range from 194 homes (R005) to 846 homes (R002); the median route has 582 homes. The Census counted 3,680 households in 70346 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.
| Homes per route | Routes |
|---|---|
| 1–249 | 1 |
| 250–499 | 1 |
| 500–749 | 3 |
| 750–999 | 2 |
| 1,000–1,499 | 0 |
| 1,500+ | 0 |
Best routes in 70346 for…
Most businesses
For B2B offers: office supplies, cleaning, IT, catering and commercial services.
- Route C001 — USPS business mailboxes 78, 426 homes
- Route C003 — USPS business mailboxes 51, 595 homes
- Route R003 — USPS business mailboxes 51, 582 homes
- Route R001 — USPS business mailboxes 37, 845 homes
- Route C002 — USPS business mailboxes 34, 580 homes
Select these 5 routes on the route map
Every carrier route in 70346
| Route | Type | Homes | Businesses | Est. median income | Est. owners | Est. families with kids | Est. moved in past year |
|---|---|---|---|---|---|---|---|
| C001 | City | 426 | 78 | $30,312 | — | — | — |
| C002 | City | 580 | 34 | $26,771 | — | — | — |
| C003 | City | 595 | 51 | $12,321 | — | — | — |
| R001 | Rural | 845 | 37 | $70,666 | — | — | — |
| R002 | Rural | 846 | 21 | $44,620 | — | — | — |
| R003 | Rural | 582 | 51 | $42,323 | — | — | — |
| R005 | Rural | 194 | 1 | $70,666 | — | — | — |
Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 70346 on the EDDM route map.
How route demographics are estimated
Mailbox counts come from USPS; demographics are estimates
The number of homes and businesses on each carrier route is the current USPS EDDM count. The Census Bureau does not publish figures for carrier routes, so income, homeownership, ages, families, movers and housing age on a route are EDDM2GO estimates built from Census block groups (neighborhood areas of roughly 600 to 3,000 people).
How a route gets its figures: the block-group length-share method
We trace each route's streets every 25 meters and record which block group each stretch falls in. The route's homes are spread along its streets in proportion to length, so a route with 60% of its street length in one block group is assumed to have 60% of its homes there. Each block group then contributes its Census counts in proportion to the share of its housing units that sit on the route (capped at the whole block group). Medians are recalculated from the combined income, home-value and age brackets, the way the Census Bureau computes them, not averaged.
Margins of error
Census survey figures carry a margin of error at 90% confidence; we carry it through the calculation and show it as ±. Our margins treat the route-to-block-group split as exact, so the real uncertainty is larger. Routes with fewer than 100 estimated households, large margins, or streets we could not place are flagged.
Different years
USPS mailbox counts are current. Census figures are 5-year averages for 2020–2024, so a new subdivision may have more homes on the route today than the Census counted. Use the route figures to compare routes with each other, not as an exact head count.
Why some routes show identical figures
Two routes that run through the same block group get the same percentages and medians, because the Census publishes one set of figures for the whole block group. Their mailbox counts still differ, and those are exact.
Route and mailbox counts: USPS EDDM route data. Route demographics: EDDM2GO estimates from U.S. Census Bureau American Community Survey 5-year block-group data (2020–2024) and 2024 cartographic block-group boundaries. This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.
Nearby ZIP codes
- 70725 — Darrow CDP, LA (3.1 mi)
- 70341 — Belle Rose CDP, LA (6.7 mi)
- 70734 (7.1 mi)
- 70393 (7.7 mi)
- 70391 — Paincourtville CDP, LA (8.1 mi)
- 70721 — St. Gabriel city, LA (8.9 mi)
- 70737 — Gonzales city, LA (10 mi)
- 70788 — Bayou Goula CDP, LA (10.1 mi)
Areas that include 70346
- Donaldsonville, LA ZIP codes — 1 ZIP code
- Belle Rose, LA ZIP codes — 2 ZIP codes
- Lemannville, LA ZIP codes — 2 ZIP codes
- Ascension County ZIP codes — 7 ZIP codes
- Assumption County ZIP codes — 8 ZIP codes
- Louisiana ZIP code data
Where it ranks
- No. 3 of 6: highest share of households with children in Ascension Parish
- No. 1 of 6: highest share of residents who moved in during the past year in Ascension Parish
- No. 2 of 6: lowest median age in Ascension Parish
- No. 5 of 6: highest median age in Ascension Parish
- No. 5 of 6: fastest population growth in Ascension Parish
Mail every home in 70346
Route counts on this page price as Full Service 6.5 × 9 postcards: we print, bundle by carrier route and hand the mailing to USPS. Prefer to take it to the Post Office yourself? Print only costs less and you pay postage at drop-off.
EDDM guides
ZIP code statistics describe the Census ZIP Code Tabulation Area (ZCTA) 70346, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.
Frequently asked questions
- What city is 70346 in?
- 70346 is a Donaldsonville, LA mailing address. By land area, 6% lies inside Donaldsonville, 2% lies inside Belle Rose and 1% lies inside Lemannville; the rest is outside any Census-defined city or community.
- What county is 70346 in?
- 70346 is mostly in Ascension Parish (79% of its land), with smaller parts in Assumption Parish County.
- What is the population of 70346?
- About 9,927 people (±612), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 10,342.
- What is the median household income in 70346?
- $35,280 (±$14,193), compared with $60,756 for Louisiana as a whole. Half the households in the ZIP code earn more and half earn less.
- How many carrier routes and mailboxes are in 70346?
- 7 USPS carrier routes with 4,068 residential and 273 business mailboxes (4,342 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
- What ZIP codes are near 70346?
- The closest, measured center to center: 70725 (3.1 mi, Darrow), 70341 (6.7 mi, Belle Rose), 70734 (7.1 mi), 70393 (7.7 mi), 70391 (8.1 mi, Paincourtville) and 70721 (8.9 mi, St. Gabriel).
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.