Living in Duncan, IA: what to set up and who to call
Duncan has no town government of its own, so Hancock County runs its elections and most services, and its children attend Garner-Hayfield-Ventura Community School District. Comm 1 Connects and Mediacom Xtream wire most of Duncan, and 100% of addresses can get fiber.
I’m new in town
What to set up in Duncan, 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 Duncan.
Power comes from Interstate Power and Light
Interstate Power and Light (Interstate Power and Light Co), an investor-owned utility, serves all of Duncan. Its homes paid an average of 17.8¢ per kWh in 2025, about $131 a month (its average across Iowa).
Start or move service: alliantenergy.com · (319) 786-4411
Service territory: HIFLD Electric Retail Service Territories (map dated Aug 2023). Prices and customers: EIA-861, 2025.
7 home internet providers serve Duncan
100% of 42 addresses can get 100/20 Mbps; 100% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| Comm 1 Connects | Fiber | 100% | 1,000/1,000 |
| Mediacom Xtream | Cable | 88% | 1,000/50 |
| Winnebago Cooperative Telecom Association | Fiber | 29% | 1,000/1,000 |
| Northwest Communications | Fixed wireless | 48% | 25/10 |
| Nextlink | Fixed wireless | 31% | 500/200 |
| T-Mobile | Fixed wireless | 14% | 25/3 |
FCC National Broadband Map, as of December 2025. Availability as providers report it, not speeds people get.
We don’t have Duncan’s trash rules yet
Pickup rules, the dump and recycling in Duncan.
Where your child goes to school
Public school districts and the school path by grade.
Most of Duncan (87%) is in Garner-Hayfield-Ventura Community School District; parts are in West Hancock Community School District (13%).
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.
No town hall: the county runs things
Duncan is unincorporated, so Hancock County is the local government.
Election office: FVAP local election office directory, updated Sep 2022; jurisdictions: EAC EAVS 2024. Registration rules and links: vote.gov, updated Nov 18, 2024.
Duncan spans 2 ZIP codes
ZIP codes where Duncan residents live, with the share of the town in each.
| ZIP | Post office name | Share of Duncan | ZIP’s residents in Duncan |
|---|---|---|---|
| 50423 | Britt, IA | 74% | 2% |
| 50438 | Garner, IA | 26% | 0% |
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 Duncan
Who provides electricity in Duncan?
Interstate Power and Light (Interstate Power and Light Co), an investor-owned utility. Its homes paid about 17.8¢ per kWh in 2025 (EIA).
What internet providers serve Duncan?
Comm 1 Connects, Mediacom Xtream, Winnebago Cooperative Telecom Association, Northwest Communications, Nextlink, T-Mobile (FCC, as of December 2025).
What ZIP codes are in Duncan?
50423 (74%), 50438 (26%), by share of residents. Census 2020 ZIP Code Tabulation Areas.
What school district is Duncan in?
Garner-Hayfield-Ventura Community School District. Parts of the city are in West Hancock Community School District.
How do I register to vote in Duncan?
In Iowa you can register online until 15 days before Election Day, in person up to and including Election Day, or by mail (postmarked 15 days before). Elections here are run by the Hancock County Auditor. Check your registration at sos.iowa.gov.
Sources & dates
Every answer above names its source. Here they are with their dates.
- 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.