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Barnum Island and Harbor Isle, NY aerial from the west 01A (9456903528)Photo: Joe Mabel (on Flickr as Joe Mabel from Seattle, US) · CC BY-SA 3.0
The Harbor Isle handbook

Living in Harbor Isle, NY: what to set up and who to call

Harbor Isle has no town government of its own, so Nassau County runs its elections and most services, and its children attend Island Park Union Free School District. Power in Harbor Isle comes from PSEG Long Island, a state utility rather than a private company.

Which school will my kid attend?How do I register to vote?ZIP codes
Harbor Isle has no town government. It’s a census-designated place in Nassau County, so the county and regional agencies provide most services. This page answers what we can; the same answers appear on Harbor Isle’s town page under “Getting set up”.

I’m new in town

What to set up in Harbor Isle, and who provides it. Tap an answer for the details and where they come from.

PowerPSEG Long Islandstate utility · 26.2¢/kWhMore →Internet3 providers100% of addresses get 100/20 MbpsMore →Trash & dumpNot on file yetWe don’t have Harbor Isle’s trash rules yetMore →SchoolIsland Park Union Free School DistrictWhich school depends on grade and addressMore →Register to voteOnlineRules from vote.govMore →ZIP code11558Where people live, not P.O. boxesMore →
Home services

Power, water and internet

Who to call to start service at a new address in Harbor Isle.

Electricity

Power comes from PSEG Long Island

PSEG Long Island (Long Island Power Authority), a state utility, serves all of Harbor Isle. Its homes paid an average of 26.2¢ per kWh in 2025, about $195 a month (its average across New York, for customers on its standard service). New York lets you buy power from another supplier; 0% of PSEG Long Island’s home customers do, and PSEG Long Island still delivers it.

Service territory: HIFLD Electric Retail Service Territories (map dated Aug 2023). Prices and customers: EIA-861, 2025.

Internet

3 home internet providers serve Harbor Isle

100% of 492 addresses can get 100/20 Mbps; 100% can get fiber.

ProviderTechnologyAddressesFastest (Mbps)
VerizonFiber, Fixed wireless99%2,300/2,300
OptimumCable, Fiber99%8,000/8,000
T-MobileFixed wireless62%25/3

FCC National Broadband Map, as of December 2025. Availability as providers report it, not speeds people get.

Trash & recycling

We don’t have Harbor Isle’s trash rules yet

Pickup rules, the dump and recycling in Harbor Isle.

Trash, recycling and bulk pickupNot on fileHarbor Isle has no town government of its own, so look for trash and recycling rules on the county’s site.
Schools

Where your child goes to school

Public school districts and the school path by grade.

Harbor Isle kids go to
PK–4Francis X Hegarty Elementary Schoolin Island Park
5–8Island Park Lincoln Orens Middle Schoolin Island Park

Harbor Isle is in Island Park Union Free 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.

Government & voting

No town hall: the county runs things

Harbor Isle is unincorporated, so Nassau County is the local government.

Local governmentNassau CountyHarbor Isle is a census-designated place: no town hall of its ownCensus
Who runs elections hereNassau County Board of ElectionsElections here are run by Nassau County (county election office). 240 Old Country Rd - 5th Floor, P.O. Box 9002, Mineola, NY 11501 · (516) 571-8683 · [email protected]FVAP, Jul 2019
Register to voteOnlineIn New York you can register online until 10 days before Election Day, in person until 10 days before Election Day, or by mail (postmarked 15 days before and received 10 days before).vote.govCheck your registration and polling placevoterlookup.elections.ny.govThe state’s voter lookup

Election office: FVAP local election office directory, updated Jul 2019; jurisdictions: EAC EAVS 2024. Registration rules and links: vote.gov, updated Aug 3, 2026.

ZIP codes & area codes

Harbor Isle is in ZIP code 11558

ZIP codes where Harbor Isle residents live, with the share of the town in each.

ZIPPost office nameShare of Harbor IsleZIP’s residents in Harbor Isle
11558Island Park, NY100%16%

Census 2020 ZIP Code Tabulation Areas, by census block; post office names: GeoNames (CC BY 4.0). ZIPs created since 2020 are missing.

Everyday places

Getting around, the ER and the library

One line each; the subject pages have the rest.

Nearest emergency roomMount Sinai South Nassau2.5 miles awayGet a library cardIsland Park Public Library176 Long Beach Road · (516) 432-0122

ER: CMS hospital data. Library: IMLS Public Libraries Survey, FY2024.

Questions about living in Harbor Isle

Who provides electricity in Harbor Isle?

PSEG Long Island (Long Island Power Authority), a state utility. Its homes paid about 26.2¢ per kWh in 2025 (EIA).

What internet providers serve Harbor Isle?

Verizon, Optimum, T-Mobile (FCC, as of December 2025).

What ZIP codes are in Harbor Isle?

11558. Census 2020 ZIP Code Tabulation Areas.

What school district is Harbor Isle in?

Island Park Union Free School District.

How do I register to vote in Harbor Isle?

In New York you can register online until 10 days before Election Day, in person until 10 days before Election Day, or by mail (postmarked 15 days before and received 10 days before). Elections here are run by the Nassau County Board of Elections. Check your registration at voterlookup.elections.ny.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 Aug 3, 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.