Photo: Chris Light · CC BY-SA 4.0Living in Littleton, CO: what to set up and who to call
Most mail in Littleton goes to 80120 (64% of residents), one of 6 ZIP codes in town. The nearest library is Littleton/Bemis Public Library, 1.5 miles away.
I’m new in town
What to set up in Littleton, 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 Littleton.
Power comes from Xcel Energy
Xcel Energy (Public Service Co. of Colorado), an investor-owned utility, serves all of Littleton. Its homes paid an average of 15.9¢ per kWh in 2025, about $93 a month (its average across Colorado).
Start or move service: xcelenergy.com · (800) 895-4999
Service territory: HIFLD Electric Retail Service Territories (map dated Aug 2023). Prices and customers: EIA-861, 2025.
Water comes from Southwest Metropolitan WSD
Southwest Metropolitan WSD supplies Littleton: about 7% of residents live in its service area. About 88% of homes are outside any mapped community water system, most likely on private wells, which EPA doesn’t regulate. It buys treated surface water (EPA lists Denver Water Board as seller) and serves 48,648 people in all.
No health-based violations reported to EPA in the five years to October 2026, like 83% of the 3,525 systems serving 10,001–50,000 people.
The latest lead result on file, the 90th percentile of homes sampled in Jan–Dec 2002, was 9.0 ppb, below the 15 ppb action level that applied. It’s from 2002: EPA has no newer result for this system.
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. CO0103723.
8 home internet providers serve Littleton
100% of 13,003 addresses can get 100/20 Mbps; 57% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| Xfinity | Cable, Fiber | 100% | 2,000/250 |
| CenturyLink | DSL, Fiber | 58% | 140/20 |
| Intrepid Fiber Networks | Fiber | 41% | 2,000/2,000 |
| Quantum Fiber | Fiber | 40% | 8,000/8,000 |
| T-Mobile | Fixed wireless | 81% | 100/20 |
| Verizon | Fixed wireless | 67% | 300/20 |
FCC National Broadband Map, as of December 2025. Availability as providers report it, not speeds people get.
We don’t have Littleton’s trash rules yet
Pickup rules, the dump and recycling in Littleton.
Where your child goes to school
Public school districts and the school path by grade.
Most of Littleton (93%) is in Littleton School District 6; parts are in Jefferson County School District R-1 (4%).
A+School gradeSee Schools →U.S. Department of Education, NCES Common Core of Data, 2024–25. Enrollment rules and registration are the district’s.
Town hall and registering to vote
Who to call, and how to register.
Election office: FVAP local election office directory, updated Sep 2025; jurisdictions: EAC EAVS 2024. Registration rules and links: vote.gov, updated Nov 18, 2024.
Littleton spans 6 ZIP codes
ZIP codes where Littleton residents live, with the share of the town in each.
| ZIP | Post office name | Share of Littleton | ZIP’s residents in Littleton |
|---|---|---|---|
| 80120 | Littleton, CO | 64% | 100% |
| 80123 | Littleton, CO | 18% | 18% |
| 80122 | Littleton, CO | 5% | 8% |
| 80127 | Littleton, CO | 5% | 5% |
| 80128 | Littleton, CO | 4% | 5% |
| 80129 | Littleton, CO | 1% | 2% |
A few homes fall in 80121, 80110. 80160, 80161, 80162, 80163, 80165, 80166 are P.O. box or single-organization ZIPs with no homes.
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 Littleton
Who supplies Littleton’s drinking water, and has it had violations?
Southwest Metropolitan WSD (EPA ID CO0103723). It reported no health-based violations to EPA in the five years to October 2026; 83% of systems its size had none. Its latest lead 90th percentile was 9.0 ppb (Jan–Dec 2002), against a 15 ppb action level.
Who provides electricity in Littleton?
Xcel Energy (Public Service Co. of Colorado), an investor-owned utility. Its homes paid about 15.9¢ per kWh in 2025 (EIA).
What internet providers serve Littleton?
Xfinity, CenturyLink, Intrepid Fiber Networks, Quantum Fiber, T-Mobile, Verizon (FCC, as of December 2025).
What ZIP codes are in Littleton?
80120 (64%), 80123 (18%), 80122 (5%), 80127 (5%), 80128 (4%), 80129 (1%), by share of residents. Census 2020 ZIP Code Tabulation Areas.
What school district is Littleton in?
Littleton School District 6. Parts of the city are in Jefferson County School District R-1.
How do I register to vote in Littleton?
In Colorado you can register online until 8 days before Election Day, in person up to and including Election Day, or by mail (postmarked 8 days before). Elections here are run by the Arapahoe County Clerk and Recorder. Check your registration at sos.state.co.us.
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 Nov 18, 2024 (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.