ZIP code 11558: Island Park, NY

ZIP code 11558 is in Island Park (55% of residents), Barnum Island (29%) and Harbor Isle (16%), in Nassau County, New York. It is in New York's 4th congressional district. Its state senate district is State Senate District 9; its state house district is Assembly District 20.

8,954residents (2020 Census)

1.5 sq miland area

3cities and towns

1congressional district

6voting precincts

See it on the map All of New York

City and county

City or town	Share of ZIP residents
Island Park	55%
Barnum Island	29%
Harbor Isle	16%

County	Share of ZIP residents
Nassau County	100%

Town or county subdivision	Share of ZIP residents
Hempstead town	100%

Congressional district

Congressional district	Share of ZIP residents
New York's 4th congressional district (NY-04)	100%

Elected officials

Office	Member	Contact	Share of residents
U.S. Representative (NY-04)	Laura Gillen (D)	202-225-5516	100%
U.S. Senator	Charles E. Schumer (D)	202-224-6542 · contact form	statewide
U.S. Senator	Kirsten E. Gillibrand (D)	202-224-4451 · contact form	statewide
State Senator (State Senate District 9)	Patricia Canzoneri-Fitzpatrick (Republican/Conservative)	516-766-8383	100%
Assembly Member (Assembly District 20)	Ari Brown (R)	516-431-0500	100%

Officials serving now (members of Congress until January 3, 2027). Sources: State legislators: Open States (public domain); Members of Congress: the @unitedstates project, congress-legislators (CC0).

Local government

Island Park website: https://villageofislandpark.gov
Island Park laws: search for the Island Park, New York code of ordinances
Barnum Island laws: search for the Barnum Island, New York code of ordinances
Harbor Isle laws: search for the Harbor Isle, New York code of ordinances
Nassau County website: http://www.nassaucountyny.gov
Nassau County laws: search for the Nassau County, New York code of ordinances

State legislative districts

State senate district	Share of ZIP residents
State Senate District 9	100%

State house district	Share of ZIP residents
Assembly District 20	100%

Voting precincts

6 voting precincts overlap ZIP 11558. Map them, with each precinct's share of the ZIP's residents.

Get this in your AI agent

Your agent can get these cities, counties, districts and precincts with their shares, and their GeoJSON boundaries, from Boundary Atlas. Add https://atlas-production-d344.up.railway.app/mcp to Claude, ChatGPT, Cursor or Codex (free, no key; how), then:

related_geographies(id="us:zcta:11558")

ZIP 11558 here is the Census Bureau's ZIP Code Tabulation Area, which approximates the USPS ZIP Code; PO-box-only ZIPs have none. Districts are the maps in force for the November 3, 2026 election.