Photo: Praiawart · CC BY 4.0Living in Darien, WI: what to set up and who to call
Elections in Darien are run by Darien itself; register with the Town of Darien Clerk. Public schools here are run by Delavan-Darien School District.
I’m new in town
What to set up in Darien, 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 Darien.
Power comes from Wisconsin Power & Light
Wisconsin Power & Light (Wisconsin Power & Light Co), an investor-owned utility, serves all of Darien. Its homes paid an average of 18.5¢ per kWh in 2025, about $128 a month (its average across Wisconsin).
Service territory: HIFLD Electric Retail Service Territories (map dated Aug 2023). Prices and customers: EIA-861, 2025.
Water comes from Pioneer Estates of Delavan water system
The Pioneer Estates of Delavan water system supplies Darien: about 25% of residents live in its service area. About 71% of homes are outside any mapped community water system, most likely on private wells, which EPA doesn’t regulate. It draws ground water and serves 400 people in all.
No health-based violations reported to EPA in the five years to October 2026, like 77% of the 15,074 systems serving 101–500 people.
The latest lead result on file, the 90th percentile of homes sampled in Jun–Sep 2021, was 1.3 ppb, below the 15 ppb action level that applied. It’s from 2021: 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 (EPA’s estimate). Violations are counted by the start of their compliance period. WI2650116.
10 home internet providers serve Darien
62% of 731 addresses can get 100/20 Mbps; 50% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| Spectrum | Cable, Fiber | 54% | 1,000/1,000 |
| Sharon Telephone Company | Fiber | 37% | 225/12 |
| Edge Broadband | Fixed wireless, Fiber | 24% | 1,000/1,000 |
| Frontier | DSL | 17% | 10/1 |
| AT&T | DSL, Fixed wireless | 10% | 25/3 |
| Rise Broadband | Fixed wireless | 65% | 25/5 |
FCC National Broadband Map, as of December 2025. Availability as providers report it, not speeds people get.
We don’t have Darien’s trash rules yet
Pickup rules, the dump and recycling in Darien.
Where your child goes to school
Public school districts and the school path by grade.
Darien is in Delavan-Darien School District.
Test scores and every school: see 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 Jun 2023; jurisdictions: EAC EAVS 2024. Registration rules and links: vote.gov, updated Nov 18, 2024.
Darien spans 2 ZIP codes
ZIP codes where Darien residents live, with the share of the town in each.
| ZIP | Post office name | Share of Darien | ZIP’s residents in Darien |
|---|---|---|---|
| 53115 | Delavan, WI | 68% | 7% |
| 53114 | Darien, WI | 32% | 21% |
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 Darien
Who supplies Darien’s drinking water, and has it had violations?
The Pioneer Estates of Delavan water system (EPA ID WI2650116). It reported no health-based violations to EPA in the five years to October 2026; 77% of systems its size had none. Its latest lead 90th percentile was 1.3 ppb (Jun–Sep 2021), against a 15 ppb action level.
Who provides electricity in Darien?
Wisconsin Power & Light (Wisconsin Power & Light Co), an investor-owned utility. Its homes paid about 18.5¢ per kWh in 2025 (EIA).
What internet providers serve Darien?
Spectrum, Sharon Telephone Company, Edge Broadband, Frontier, AT&T, Rise Broadband (FCC, as of December 2025).
What ZIP codes are in Darien?
53115 (68%), 53114 (32%), by share of residents. Census 2020 ZIP Code Tabulation Areas.
What school district is Darien in?
Delavan-Darien School District.
How do I register to vote in Darien?
In Wisconsin you can register online until 20 days before Election Day, in person up to and including Election Day, or by mail (postmarked 20 days before). Elections here are run by the Town of Darien Clerk. Check your registration at myvote.wi.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 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.