ZIP code 70380: Morgan City, LA
ZIP code 70380 is in Morgan City (54% of residents), Bayou Vista (20%), Amelia (9.7%), Bayou L'Ourse (8.6%) and Siracusaville (1.4%), in St. Mary Parish (86%), Assumption Parish (9.1%) and St. Martin Parish (5.3%), Louisiana. 5.9% of its residents live outside city limits. It is in Louisiana's 3rd congressional district (86%) and Louisiana's 6th congressional district (14%). Its state senate district is State Senate District 21; its state house districts are State House District 50 (55%) and State House District 51 (45%).
See it on the mapAll of Louisiana
City and county
| City or town | Share of ZIP residents |
|---|---|
| Morgan City | 54% |
| Bayou Vista | 20% |
| Amelia | 9.7% |
| Bayou L'Ourse | 8.6% |
| Siracusaville | 1.4% |
| County | Share of ZIP residents |
|---|---|
| St. Mary Parish | 86% |
| Assumption Parish | 9.1% |
| St. Martin Parish | 5.3% |
| Town or county subdivision | Share of ZIP residents |
|---|---|
| District 7 | 25% |
| District 8 | 21% |
| District 4 | 20% |
| District 6 | 19% |
| District 3 | 9.1% |
| District 1 | 5.3% |
Congressional districts
| Congressional district | Share of ZIP residents |
|---|---|
| Louisiana's 3rd congressional district (LA-03) | 86% |
| Louisiana's 6th congressional district (LA-06) | 14% |
This ZIP is split between districts. A mailing address in it could be in either; the map or locate_point gives the district for an exact address.
Elected officials
| Office | Member | Contact | Share of residents |
|---|---|---|---|
| U.S. Representative (LA-03) | Clay Higgins (R) | 202-225-2031 | 86% |
| U.S. Representative (LA-06) | Cleo Fields (D) | 202-225-3901 | 14% |
| U.S. Senator | Bill Cassidy (R) | 202-224-5824 · contact form | statewide |
| U.S. Senator | John Kennedy (R) | 202-224-4623 · contact form | statewide |
| State Senator (State Senate District 21) | Robert Allain (R) | 985-850-2738 | 100% |
| State Representative (State House District 50) | Vinney St. Blanc (R) | 337-828-7778 | 55% |
| State Representative (State House District 51) | Beryl Amedée (R) | 985-858-2967 | 45% |
Elected in 2024 under LA's previous congressional map; this district's lines changed for the 120th Congress (seated January 3, 2027).
Officials serving now (members of Congress until January 3, 2027). Sources: State legislators: Open States (public domain); Members of Congress: the @unitedstates project, congress-legislators (CC0).
Local government
- Morgan City website: http://www.cityofmc.com/
- Morgan City laws: search for the Morgan City, Louisiana code of ordinances
- Bayou Vista laws: search for the Bayou Vista, Louisiana code of ordinances
- Amelia laws: search for the Amelia, Louisiana code of ordinances
- St. Mary Parish website: https://www.stmaryparishla.gov/
- St. Mary Parish laws: search for the St. Mary Parish, Louisiana code of ordinances
- Assumption Parish website: https://assumptionla.com/
- Assumption Parish laws: search for the Assumption Parish, Louisiana code of ordinances
State legislative districts
| State senate district | Share of ZIP residents |
|---|---|
| State Senate District 21 | 100% |
| State house district | Share of ZIP residents |
|---|---|
| State House District 50 | 55% |
| State House District 51 | 45% |
Voting precincts
17 voting precincts overlap ZIP 70380. Map them, with each precinct's share of the ZIP's residents.
Get this in your AI agent
Your agent can get these cities, counties, districts and precincts with their shares, and their GeoJSON boundaries, from Boundary Atlas. Add https://atlas-production-d344.up.railway.app/mcp to Claude, ChatGPT, Cursor or Codex (free, no key; how), then:
related_geographies(id="us:zcta:70380")
ZIP 70380 here is the Census Bureau's ZIP Code Tabulation Area, which approximates the USPS ZIP Code; PO-box-only ZIPs have none. Districts are the maps in force for the November 3, 2026 election.