Photo: Infrogmation · CC BY 2.5Living in Jefferson, LA: what to set up and who to call
Jefferson has no town government of its own, so Jefferson Parish runs its elections and most services, and its children attend Jefferson Parish School District. Jefferson has its own library, Rosedale Branch, at 4036 Jefferson Highway.
I’m new in town
What to set up in Jefferson, and who provides it. Tap an answer for the details and where they come from.
Power, water and internet
Who to call to start service at a new address in Jefferson.
Power comes from Entergy Louisiana
Entergy Louisiana (Entergy Louisiana LLC), an investor-owned utility, serves all of Jefferson. Its homes paid an average of 11.9¢ per kWh in 2025, about $147 a month (its average across Louisiana).
Service territory: HIFLD Electric Retail Service Territories (map dated Aug 2023). Prices and customers: EIA-861, 2025.
Water comes from E Jefferson Ww District 1
E Jefferson Ww District 1 supplies almost all of Jefferson. It draws surface water and serves 275,163 people in all.
No health-based violations reported to EPA in the five years to October 2026, like 86% of the 84 systems serving 250,001–500,000 people.
The latest lead result on file, the 90th percentile of homes sampled in Jan 2023–Dec 2025, was 2.7 ppb, below the 15 ppb action level that applied. That’s higher than 75% of similar systems’ latest results.
The system’s full record: EPA ECHO report
EPA SDWIS via Envirofacts (violations pulled Oct 9, 2026) and ECHO (lead samples, 2026Q3); service area: EPA Community Water System Service Area Boundaries v3.0. Violations are counted by the start of their compliance period. LA1051001.
5 home internet providers serve Jefferson
98% of 4,054 addresses can get 100/20 Mbps; 53% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| Cox Communications | Cable | 96% | 2,000/100 |
| AT&T | DSL, Fiber, Fixed wireless | 95% | 5,000/5,000 |
| Verizon | Fixed wireless | 95% | 300/20 |
| T-Mobile | Fixed wireless | 52% | 100/20 |
| NOLA Broadband | Fixed wireless | 7% | 100/25 |
FCC National Broadband Map, as of December 2025. Availability as providers report it, not speeds people get.
We don’t have Jefferson’s trash rules yet
Pickup rules, the dump and recycling in Jefferson.
Where your child goes to school
Public school districts and the school path by grade.
Jefferson is in Jefferson Parish School District.
BSchool gradeSee Schools →U.S. Department of Education, NCES Common Core of Data, 2024–25. Enrollment rules and registration are the district’s.
No town hall: the county runs things
Jefferson is unincorporated, so Jefferson Parish is the local government.
Election office: FVAP local election office directory, updated Feb 2022; jurisdictions: EAC EAVS 2024. Registration rules and links: vote.gov, updated Aug 3, 2026.
Jefferson is in ZIP code 70121
ZIP codes where Jefferson residents live, with the share of the town in each.
| ZIP | Post office name | Share of Jefferson | ZIP’s residents in Jefferson |
|---|---|---|---|
| 70121 | New Orleans, LA | 100% | 92% |
Census 2020 ZIP Code Tabulation Areas, by census block; post office names: GeoNames (CC BY 4.0). ZIPs created since 2020 are missing.
Getting around, the ER and the library
One line each; the subject pages have the rest.
ER: CMS hospital data. Library: IMLS Public Libraries Survey, FY2024.
Questions about living in Jefferson
Who supplies Jefferson’s drinking water, and has it had violations?
E Jefferson Ww District 1 (EPA ID LA1051001). It reported no health-based violations to EPA in the five years to October 2026; 86% of systems its size had none. Its latest lead 90th percentile was 2.7 ppb (Jan 2023–Dec 2025), against a 15 ppb action level.
Who provides electricity in Jefferson?
Entergy Louisiana (Entergy Louisiana LLC), an investor-owned utility. Its homes paid about 11.9¢ per kWh in 2025 (EIA).
What internet providers serve Jefferson?
Cox Communications, AT&T, Verizon, T-Mobile, NOLA Broadband (FCC, as of December 2025).
What ZIP codes are in Jefferson?
70121. Census 2020 ZIP Code Tabulation Areas.
What school district is Jefferson in?
Jefferson Parish School District.
How do I register to vote in Jefferson?
In Louisiana you can register online until 20 days before Election Day, in person until 30 days before Election Day, or by mail (postmarked 30 days before). Elections here are run by the Jefferson Parish Registrar of Voters. Check your registration at voterportal.sos.la.gov.
Sources & dates
Every answer above names its source. Here they are with their dates.
- Water: EPA SDWIS (Envirofacts, pulled Oct 9, 2026), ECHO SDWA 2026Q3, EPA CWS Service Area Boundaries v3.0.
- Power: HIFLD Electric Retail Service Territories (map Aug 2023); EIA-861 final 2025.
- Trash: OpenStreetMap, Geofabrik extract of Oct 9, 2026. © OpenStreetMap contributors (ODbL).
- ZIP codes: Census 2020 ZCTA relationship files; GeoNames postal codes (CC BY 4.0).
- Schools: NCES Common Core of Data, 2024–25.
- Registration: vote.gov, updated Aug 3, 2026 (read Oct 10, 2026). Official sites and area codes: Wikidata.
- Election office: FVAP local election office directory (fetched Oct 10, 2026; each record dated), EAC EAVS 2024 jurisdictions; registration and lookup links from vote.gov’s state data, checked Oct 10, 2026.
- Internet: FCC National Broadband Map, as of December 2025.