Living in Rocky Boy's Agency, MT: what to set up and who to call
Rocky Boy's Agency has no town government of its own, so Hill County runs its elections and most services, and its children attend Rocky Boy Elementary School District. Power in Rocky Boy's Agency comes from Hill County Electric Coop, a cooperative utility rather than a private company.
I’m new in town
What to set up in Rocky Boy's Agency, 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 Rocky Boy's Agency.
Power comes from Hill County Electric Coop
Hill County Electric Coop (Hill County Electric Coop, Inc), a cooperative utility, serves all of Rocky Boy's Agency.
Start or move service: www.hcelectric.com · (406) 394-7804
Service territory: HIFLD Electric Retail Service Territories (map dated Aug 2023). Prices and customers: EIA-861, 2025.
Water comes from Eagleman Community Water
Eagleman Community Water supplies Rocky Boy's Agency: about 41% of residents live in its service area. Rocky Boy Agency Water System serves another 38%. About 25% 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 Jan–Dec 2026, was 0.0 ppb, below the 15 ppb action level that applied. The highest in five years was 49.0 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. 083090074.
2 home internet providers serve Rocky Boy's Agency
96% of 105 addresses can get 100/20 Mbps; 96% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| Triangle Communications | Fiber | 98% | 100/20 |
| Verizon | Fixed wireless | 70% | 300/20 |
FCC National Broadband Map, as of December 2025. Availability as providers report it, not speeds people get.
We don’t have Rocky Boy's Agency’s trash rules yet
Pickup rules, the dump and recycling in Rocky Boy's Agency.
Where your child goes to school
Public school districts and the school path by grade.
Rocky Boy's Agency is in two districts that split the grades: Rocky Boy Elementary School District and Rocky Boy High 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.
No town hall: the county runs things
Rocky Boy's Agency is unincorporated, so Hill County is the local government.
Election office: FVAP local election office directory, updated Jul 2023; jurisdictions: EAC EAVS 2024. Registration rules and links: vote.gov, updated Nov 18, 2024.
Rocky Boy's Agency is in ZIP code 59521
ZIP codes where Rocky Boy's Agency residents live, with the share of the town in each.
| ZIP | Post office name | Share of Rocky Boy's Agency | ZIP’s residents in Rocky Boy's Agency |
|---|---|---|---|
| 59521 | Box Elder, MT | 100% | 11% |
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 Rocky Boy's Agency
Who supplies Rocky Boy's Agency’s drinking water, and has it had violations?
Eagleman Community Water (EPA ID 083090074). 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 0.0 ppb (Jan–Dec 2026), against a 15 ppb action level.
Who provides electricity in Rocky Boy's Agency?
Hill County Electric Coop (Hill County Electric Coop, Inc), a cooperative utility.
What internet providers serve Rocky Boy's Agency?
Triangle Communications, Verizon (FCC, as of December 2025).
What ZIP codes are in Rocky Boy's Agency?
59521. Census 2020 ZIP Code Tabulation Areas.
What school district is Rocky Boy's Agency in?
Rocky Boy Elementary School District and Rocky Boy High School District.
How do I register to vote in Rocky Boy's Agency?
Montana has no online registration; you can register in person up to and including Election Day or by mail (postmarked 30 days before). Elections here are run by the Hill County Election Administrator. Check your registration at prodvoterportal.mt.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.