Photo: Captain Bluecrab · CC BY-SA 3.0Living in Rock Hall, MD: what to set up and who to call
All of Rock Hall gets its mail under one ZIP code, 21661. Rock Hall has its own library, Rock Hall Branch, at 5746 N Main Street.
I’m new in town
What to set up in Rock Hall, 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 Rock Hall.
Power comes from Delmarva Power
Delmarva Power (Delmarva Power), an investor-owned utility, serves all of Rock Hall. Its homes paid an average of 21.8¢ per kWh in 2025, about $214 a month (its average across Maryland, for customers on its standard service). Maryland lets you buy power from another supplier; 3% of Delmarva Power’s home customers do, and Delmarva Power still delivers it.
Service territory: HIFLD Electric Retail Service Territories (map dated Aug 2023). Prices and customers: EIA-861, 2025.
Water comes from Town of Rock Hall water system
The Town of Rock Hall water system supplies almost all of Rock Hall. It draws ground water and serves 1,750 people in all.
No health-based violations reported to EPA in the five years to October 2026, like 78% of the 7,966 systems serving 1,001–3,300 people.
The latest lead result on file, the 90th percentile of homes sampled in Jan 2021–Dec 2023, was 3.5 ppb, below the 15 ppb action level that applied. That’s higher than 86% 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. MD0140006.
6 home internet providers serve Rock Hall
99% of 895 addresses can get 100/20 Mbps; 79% can get fiber.
| Provider | Technology | Addresses | Fastest (Mbps) |
|---|---|---|---|
| Breezeline | Cable | 95% | 250/20 |
| ThinkBig Networks | Fiber | 70% | 1,000/1,000 |
| Talkie Communications | Fiber | 11% | 10,000/10,000 |
| BridgeMAXX Suncoast Broadband | Fixed wireless | 67% | 100/20 |
| T-Mobile | Fixed wireless | 37% | 100/20 |
| AT&T | Fixed wireless | 37% | 25/3 |
FCC National Broadband Map, as of December 2025. Availability as providers report it, not speeds people get.
We don’t have Rock Hall’s trash rules yet
Pickup rules, the dump and recycling in Rock Hall.
Where your child goes to school
Public school districts and the school path by grade.
Rock Hall is in Kent County Public Schools.
C+School gradeSee 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 Mar 2018; jurisdictions: EAC EAVS 2024. Registration rules and links: vote.gov, updated Mar 11, 2026.
Rock Hall is in ZIP code 21661
ZIP codes where Rock Hall residents live, with the share of the town in each.
| ZIP | Post office name | Share of Rock Hall | ZIP’s residents in Rock Hall |
|---|---|---|---|
| 21661 | Rock Hall, MD | 100% | 49% |
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 Rock Hall
Who supplies Rock Hall’s drinking water, and has it had violations?
The Town of Rock Hall water system (EPA ID MD0140006). 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 3.5 ppb (Jan 2021–Dec 2023), against a 15 ppb action level.
Who provides electricity in Rock Hall?
Delmarva Power (Delmarva Power), an investor-owned utility. Its homes paid about 21.8¢ per kWh in 2025 (EIA).
What internet providers serve Rock Hall?
Breezeline, ThinkBig Networks, Talkie Communications, BridgeMAXX Suncoast Broadband, T-Mobile, AT&T (FCC, as of December 2025).
What ZIP codes are in Rock Hall?
21661. Census 2020 ZIP Code Tabulation Areas.
What school district is Rock Hall in?
Kent County Public Schools.
How do I register to vote in Rock Hall?
In Maryland you can register online until 21 days before Election Day, in person up to and including Election Day, or by mail (postmarked 21 days before). Elections here are run by the Kent County Board of Elections. Check your registration at voterservices.elections.maryland.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 Mar 11, 2026 (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.