Living in Denison, KS: what to set up and who to call
All of Denison gets its mail under one ZIP code, 66419. Public schools here are run by Holton Unified School District 336.
I’m new in town
What to set up in Denison, 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 Denison.
Power comes from Evergy
Evergy (Evergy Kansas Central, Inc.), an investor-owned utility, serves all of Denison. Its homes paid an average of 14.6¢ per kWh in 2025, about $124 a month (its average across Kansas).
Start or move service: evergy.com
Service territory: HIFLD Electric Retail Service Territories (map dated Aug 2023). Prices and customers: EIA-861, 2025.
Water comes from City of Denison water system
The City of Denison water system supplies Denison: about 60% of residents live in its service area. About 40% 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 Jackson Co RWD 3 as seller) and serves 145 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 Jan–Dec 2026, was 2.4 ppb, below the 15 ppb action level that applied. The highest in five years was 77.0 ppb. That’s higher than 77% 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. KS2008505.
2 home internet providers serve Denison
100% of 98 addresses can get 100/20 Mbps; 100% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| Giant Communications | Fiber | 100% | 1,000/1,000 |
| Brightspeed | DSL | 93% | 60/5 |
FCC National Broadband Map, as of December 2025. Availability as providers report it, not speeds people get.
We don’t have Denison’s trash rules yet
Pickup rules, the dump and recycling in Denison.
Where your child goes to school
Public school districts and the school path by grade.
Denison is in Holton Unified School District 336.
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 Dec 2025; jurisdictions: EAC EAVS 2024. Registration rules and links: vote.gov, updated Nov 18, 2024.
Denison is in ZIP code 66419
ZIP codes where Denison residents live, with the share of the town in each.
| ZIP | Post office name | Share of Denison | ZIP’s residents in Denison |
|---|---|---|---|
| 66419 | Denison, KS | 100% | 35% |
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 Denison
Who supplies Denison’s drinking water, and has it had violations?
The City of Denison water system (EPA ID KS2008505). 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 2.4 ppb (Jan–Dec 2026), against a 15 ppb action level.
Who provides electricity in Denison?
Evergy (Evergy Kansas Central, Inc.), an investor-owned utility. Its homes paid about 14.6¢ per kWh in 2025 (EIA).
What internet providers serve Denison?
Giant Communications, Brightspeed (FCC, as of December 2025).
What ZIP codes are in Denison?
66419. Census 2020 ZIP Code Tabulation Areas.
What school district is Denison in?
Holton Unified School District 336.
How do I register to vote in Denison?
In Kansas you can register online until 21 days before Election Day, in person until 21 days before Election Day, or by mail (postmarked 21 days before). Elections here are run by the Jackson County Clerk. Check your registration at myvoteinfo.voteks.org.
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.