Residential delivery area · Louisiana
ZIP Code 70380: Morgan City, LA
ZIP code 70380 uses the postal name Morgan City, Louisiana and lies mostly in Assumption Parish (39% of its land), reaching into St. Mary Parish and St. Martin Parish (Census 2020 ZIP-county file). About 21,000 people live there (Census Bureau, ACS 2020-2024). Median household income is $54,595 (Census Bureau, ACS 2020-2024). By Census place, its land lies in Morgan City (8%), Bayou L'Ourse (4%), Amelia (3%), Bayou Vista (2%) and Siracusaville (1%); 82% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Morgan City · its only residential ZIP
- County
- Assumption Parish (39%); St. Mary Parish (32%); St. Martin Parish (29%)
- Census places
- Morgan City (8%); Bayou L'Ourse (4%) census-designated place; Amelia (3%) census-designated place; Bayou Vista (2%) census-designated place
- Metro area
- Baton Rouge, LA
- House districts
- LA-3 (61%), LA-2 (39%) 119th Congress, by share of land
- State
- Louisiana
- Time zone
- Central
- Land area
- 77.7 sq mi · 264 people per sq mi
- PO Box ZIPs
- 70381 also use the name Morgan City
Where is ZIP code 70380?
70380 centers on 29.752°, -91.104° and covers 77.7 square miles of land plus 21.7 of water. It borders 7 ZIP codes: 70340, 70372, 70342, 70390, 70356, 70339, 70392.
The map draws ZIP code areas only. For the streets inside 70380, open its center on OpenStreetMap.
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries and the 2023 Gazetteer (2020 ZCTAs); ZIP-to-county shares, Census places and House districts (119th Congress) from the Census 2020 relationship files (shares of land); metro area from the OMB delineation (July 2023); town name and time zone from simplemaps US ZIP Codes (CC BY 4.0).
How does 70380 compare with the rest of Assumption Parish?
| Measure | 70380 | In Assumption Parish | In LA |
|---|---|---|---|
| People (ACS 2020-2024) | 20,529 | 2nd of 9 | 84th of 539 |
| Median household income | $55k | 3rd of 4 | 152nd of 251 |
| Median home value | $142k | 5th of 5 | 209th of 285 |
Its median household income is higher than in 21% of U.S. residential ZIP codes, and it is denser than 66% of all U.S. residential ZIP codes. ZIP codes at the ACS caps ($250,000 or more for household income, $2,000,000 or more for home value) share the top rank.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B19013, B25077); ranks by PlainZIP over residential ZIP codes (ZCTAs).
How many people live in 70380?
The 2020 Census counted 21,079 people in 70380; the ACS, which samples households over 2020-2024, estimates 20,529. Its boundary changed between the 2010 and 2020 censuses, so the two counts are not compared.
- People, ACS 2020-2024
- 20,529
- 2020 Census count
- 21,079
- Households
- 7,968
- Median age
- 41.2
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B01002, B11001); 2020 Census (DHC P1); 2010 Census (SF1 P1).
Who lives in 70380?
Of the 20,529 people the ACS estimates in 70380, 22.5% are under 18 and 17.4% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (63.1%), then Hispanic or Latino (17.1%).
- Under 1822.5%
- 18 to 6460.0%
- 65 and older17.4%
- White, not Hispanic63.1%
- Hispanic or Latino17.1%
- Black, not Hispanic12.6%
- Other or two or more5.2%
- Asian, not Hispanic2.0%
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01001 age by sex, B03002 Hispanic or Latino origin by race); shares of the estimated population, small ZIP codes carry wide margins.
What do households in 70380 earn?
Median household income is $54,595 (ACS 2020-2024), the 3rd highest of the 4 ranked ZIP codes in Assumption Parish.
- Median household income
- $54,595±$5,661
- Income per person
- $30,699
- Below the poverty line
- 17.8%
- Unemployed (of the labor force)
- 5.8%
- Adults 25+ with a bachelor's degree
- 13.2%
- Adjusted gross income per tax return, 2022
- $56,5227,450 returns; wages 71% of AGI (IRS)
Source: U.S. Census Bureau, ACS 2020-2024 and 2015-2019 5-year estimates (B19013, B19301, B17001, B23025, B15003; 2015-2019 dollars converted with the BLS CPI-U, 1.22699); IRS Statistics of Income, ZIP code data, tax year 2022 (adjusted gross income per return, filed under the address on the return).
What are homes worth in 70380?
FHFA's house price index for 70380, built from repeat sales and appraisals of the same homes, rose 5% from 2015 to 2025 and rose 4% from 2020 to 2025, and moved −9.6% in 2025.
- Median home value (owners' estimate)
- $141,600
- Median gross rent
- $883
- Homes owned by their occupants
- 68.9%
- Housing units
- 9,719
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B25077, B25064, B25003, B25001); FHFA House Price Index, annual five-digit ZIP, updated 2026-03-31.
What businesses are in 70380?
555 business establishments had a location in this ZIP code in 2023, 50 fewer than in 2018; the most are in retail trade (ZIP Code Business Patterns).
- Retail trade89
- Other services (except public administration)55
- Health care and social assistance53
- Accommodation and food services51
- Finance and insurance48
- Professional, scientific, and technical services45
Source: U.S. Census Bureau, ZIP Code Business Patterns 2023 and 2018 (establishments with paid employees, by the business's ZIP code).
Which ZIP codes are next to 70380?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 70340 | Amelia | 0 | – | 5.7 mi |
| 70372 | Labadieville | 1,968 | $41k | 7.2 mi |
| 70342 | Berwick | 4,607 | $52k | 9.1 mi |
| 70390 | Napoleonville | 7,160 | $59k | 10.5 mi |
| 70356 | Gibson | 1,495 | $33k | 11.5 mi |
| 70339 | Pierre Part | 4,848 | $52k | 11.6 mi |
| 70392 | Patterson | 8,173 | $58k | 13.4 mi |
| 70352 | Donner | 167 | – | 10.9 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.
Which other ZIP codes use the name Morgan City?
1 more ZIP code carries the postal name Morgan City, LA without a residential delivery area: PO boxes at the post office, or a single organization with its own ZIP code. The Census Bureau publishes no figures for it.
| ZIP | County |
|---|---|
| 70381 | Assumption Parish |
Source: GeoNames postal codes (CC BY 4.0), downloaded 2026-10-09; a ZIP code with no Census ZCTA has no residential delivery area.