Living in Vassar, KS: what to set up and who to call
Vassar has no town government of its own, so Osage County runs its elections and most services, and its children attend Lyndon Unified School District 421. Tap water in Vassar comes from Osage Co RWD 3, which has a clean five-year EPA record (about 22% of systems its size had a health-based violation) and a latest lead result below detection.
I’m new in town
What to set up in Vassar, 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 Vassar.
Power comes from Evergy
Evergy (Evergy Metro), an investor-owned utility, serves all of Vassar. Its homes paid an average of 13.2¢ per kWh in 2025, about $129 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 Osage Co RWD 3
Osage Co RWD 3 supplies almost all of Vassar. It draws surface water and serves 900 people in all.
No health-based violations reported to EPA in the five years to October 2026, like 78% of the 5,327 systems serving 501–1,000 people.
The latest lead result on file, the 90th percentile of homes sampled in Jan–Dec 2025, was 0.0 ppb, below the 15 ppb action level that applied. The highest in five years was 1.7 ppb. Results below detection are reported as 0, so 0 doesn’t mean no lead at any tap.
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. KS2013910.
Which providers serve Vassar
This card will list the home internet providers the FCC’s National Broadband Map shows in Vassar, the share of addresses that can get 100/20 Mbps and the share with fiber, with the map’s “as of” date.
Source to come: FCC Broadband Data Collection.
We don’t have Vassar’s trash rules yet
Pickup rules, the dump and recycling in Vassar.
Where your child goes to school
Public school districts and the school path by grade.
Most of Vassar (97%) is in Lyndon Unified School District 421; parts are in West Franklin Unified School District 287 (3%).
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
Vassar is unincorporated, so Osage County is the local government.
Election office: FVAP local election office directory, updated Dec 2025; jurisdictions: EAC EAVS 2024. Registration rules and links: vote.gov, updated Nov 18, 2024.
Vassar is in ZIP code 66543
ZIP codes where Vassar residents live, with the share of the town in each.
| ZIP | Post office name | Share of Vassar | ZIP’s residents in Vassar |
|---|---|---|---|
| 66543 | Vassar, KS | 100% | 75% |
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 Vassar
Who supplies Vassar’s drinking water, and has it had violations?
Osage Co RWD 3 (EPA ID KS2013910). It reported no health-based violations to EPA in the five years to October 2026; 78% of systems its size had none. Its latest lead 90th percentile was 0.0 ppb (Jan–Dec 2025), against a 15 ppb action level.
Who provides electricity in Vassar?
Evergy (Evergy Metro), an investor-owned utility. Its homes paid about 13.2¢ per kWh in 2025 (EIA).
What ZIP codes are in Vassar?
66543. Census 2020 ZIP Code Tabulation Areas.
What school district is Vassar in?
Lyndon Unified School District 421. Parts of the city are in West Franklin Unified School District 287.
How do I register to vote in Vassar?
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 Osage 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): pending.