ZIP code 11780: St. James, NY

ZIP code 11780 is in St. James (74% of residents), Nissequogue (10%), Head of the Harbor (8.9%) and Smithtown (5.9%), in Suffolk County, New York. It is in New York's 1st congressional district. Its state senate districts are State Senate District 2 (99%), State Senate District 1 (0.5%) and State Senate District 3 (0.1%); its state house districts are Assembly District 8 (99%) and Assembly District 4 (0.6%).

15,508residents (2020 Census)

11.5 sq miland area

6cities and towns

1congressional district

14voting precincts

See it on the map All of New York

City and county

City or town	Share of ZIP residents
St. James	74%
Nissequogue	10%
Head of the Harbor	8.9%
Smithtown	5.9%
Stony Brook	0.6%
Nesconset	0.1%

County	Share of ZIP residents
Suffolk County	100%

Town or county subdivision	Share of ZIP residents
Smithtown town	99%
Brookhaven town	0.6%

Congressional district

Congressional district	Share of ZIP residents
New York's 1st congressional district (NY-01)	100%

Elected officials

Office	Member	Contact	Share of residents
U.S. Representative (NY-01)	Nick LaLota (R)	202-225-3826	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 2)	Mario Mattera (Republican/Conservative)	631-361-2154	99%
State Senator (State Senate District 1)	Tony Palumbo (R)	631-461-9100	0.5%
State Senator (State Senate District 3)	Dean Murray (Republican/Conservative)	631-360-3356	0.1%
Assembly Member (Assembly District 8)	Mike Fitzpatrick (R)	631-724-2929	99%
Assembly Member (Assembly District 4)	Rebecca Kassay (Democratic)	631-751-3094	0.6%

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

St. James laws: search for the St. James, New York code of ordinances
Nissequogue website: https://nissequogueny.gov
Nissequogue laws: search for the Nissequogue, New York code of ordinances
Head of the Harbor website: https://headoftheharborny.gov
Head of the Harbor laws: search for the Head of the Harbor, 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 2	99%
State Senate District 1	0.5%
State Senate District 3	0.1%

State house district	Share of ZIP residents
Assembly District 8	99%
Assembly District 4	0.6%

Voting precincts

14 voting precincts overlap ZIP 11780. Map them, with each precinct's share of the ZIP's residents.

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ZIP 11780 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.