ZIP code 70403: Hammond, LA
ZIP code 70403 is in Hammond (29% of residents), in Tangipahoa Parish (94%) and Livingston Parish (5.7%), Louisiana. 71% of its residents live outside city limits. It is in Louisiana's 5th congressional district (73%), Louisiana's 1st congressional district (21%) and Louisiana's 6th congressional district (5.7%). Its state senate districts are State Senate District 37 (94%) and State Senate District 6 (5.7%); its state house districts are State House District 73 (37%), State House District 86 (27%), State House District 95 (19%) and State House District 72 (17%).
See it on the mapAll of Louisiana
City and county
| City or town | Share of ZIP residents |
|---|---|
| Hammond | 29% |
| Ponchatoula | 0.6% |
| Albany | <0.1% |
| County | Share of ZIP residents |
|---|---|
| Tangipahoa Parish | 94% |
| Livingston Parish | 5.7% |
| Town or county subdivision | Share of ZIP residents |
|---|---|
| District 6 | 37% |
| District 8 | 24% |
| District 7 | 23% |
| District 10 | 10% |
| District 9 | 5.4% |
| District 8 | 0.3% |
Congressional districts
| Congressional district | Share of ZIP residents |
|---|---|
| Louisiana's 5th congressional district (LA-05) | 73% |
| Louisiana's 1st congressional district (LA-01) | 21% |
| Louisiana's 6th congressional district (LA-06) | 5.7% |
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.
Members of Congress
| Office | Member | Contact | Share of residents |
|---|---|---|---|
| U.S. Representative (LA-05) | Julia Letlow (R) | 202-225-8490 | 73% |
| U.S. Representative (LA-01) | Steve Scalise (R) | 202-225-3015 | 21% |
| U.S. Representative (LA-06) | Cleo Fields (D) | 202-225-3901 | 5.7% |
| U.S. Senator | Bill Cassidy (R) | 202-224-5824 · contact form | statewide |
| U.S. Senator | John Kennedy (R) | 202-224-4623 · contact form | statewide |
Elected in 2024 under LA's previous congressional map; this district's lines changed for the 120th Congress (seated January 3, 2027).
Members serving now (119th Congress, until January 3, 2027). Source: Members of Congress: the @unitedstates project, congress-legislators (CC0).
State legislative districts
| State senate district | Share of ZIP residents |
|---|---|
| State Senate District 37 | 94% |
| State Senate District 6 | 5.7% |
| State house district | Share of ZIP residents |
|---|---|
| State House District 73 | 37% |
| State House District 86 | 27% |
| State House District 95 | 19% |
| State House District 72 | 17% |
Voting precincts
22 voting precincts overlap ZIP 70403. 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:70403")
ZIP 70403 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.