ZIP code 11742: Holtsville, NY
ZIP code 11742 is in Holtsville, in Suffolk County, New York. It is in New York's 2nd congressional district (82%) and New York's 1st congressional district (18%). Its state senate districts are State Senate District 3 (95%) and State Senate District 8 (5.2%); its state house districts are Assembly District 5 (89%) and Assembly District 3 (11%).
See it on the mapAll of New York
City and county
| City or town | Share of ZIP residents |
|---|---|
| Holtsville | 100% |
| Farmingville | 0.4% |
| County | Share of ZIP residents |
|---|---|
| Suffolk County | 100% |
| Town or county subdivision | Share of ZIP residents |
|---|---|
| Brookhaven town | 76% |
| Islip town | 24% |
Congressional districts
| Congressional district | Share of ZIP residents |
|---|---|
| New York's 2nd congressional district (NY-02) | 82% |
| New York's 1st congressional district (NY-01) | 18% |
This ZIP is split between districts. A mailing address in it could be in either; the map or locate_point gives the district for an exact address.
Elected officials
| Office | Member | Contact | Share of residents |
|---|---|---|---|
| U.S. Representative (NY-02) | Andrew R. Garbarino (R) | 202-225-7896 | 82% |
| U.S. Representative (NY-01) | Nick LaLota (R) | 202-225-3826 | 18% |
| 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 3) | Dean Murray (Republican/Conservative) | 631-360-3356 | 95% |
| State Senator (State Senate District 8) | Alexis Weik (Republican/Conservative) | 631-665-2311 | 5.2% |
| Assembly Member (Assembly District 5) | Doug Smith (R) | 631-585-0230 | 89% |
| Assembly Member (Assembly District 3) | Joe DeStefano (Republican/Conservative) | 631-207-0073 | 11% |
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
- Holtsville laws: search for the Holtsville, New York code of ordinances
- Suffolk County website: https://suffolkcountyny.gov/
- Suffolk County laws: search for the Suffolk County, New York code of ordinances
State legislative districts
| State senate district | Share of ZIP residents |
|---|---|
| State Senate District 3 | 95% |
| State Senate District 8 | 5.2% |
| State house district | Share of ZIP residents |
|---|---|
| Assembly District 5 | 89% |
| Assembly District 3 | 11% |
Voting precincts
15 voting precincts overlap ZIP 11742. 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:11742")
ZIP 11742 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.