Boundary Atlas

ZIP code 10509: Southeast, NY

ZIP code 10509 is in Brewster (13% of residents), Brewster Hill (9.9%), Peach Lake (5.7%), Putnam Lake (5.7%) and Brewster Heights (5.5%), in Putnam County (100%) and Westchester County (0.4%), New York. 60% of its residents live outside city limits. It is in New York's 17th congressional district. Its state senate district is State Senate District 40; its state house districts are Assembly District 94 (100%) and Assembly District 93 (0.4%).

19,501residents (2020 Census)
36.1 sq miland area
5cities and towns
1congressional district
19voting precincts

See it on the mapAll of New York

City and county

City or townShare of ZIP residents
Brewster13%
Brewster Hill9.9%
Peach Lake5.7%
Putnam Lake5.7%
Brewster Heights5.5%

CountyShare of ZIP residents
Putnam County100%
Westchester County0.4%

Town or county subdivisionShare of ZIP residents
Southeast town87%
Patterson town12%
North Salem town0.4%

Congressional district

Congressional districtShare of ZIP residents
New York's 17th congressional district (NY-17)100%

Elected officials

OfficeMemberContactShare of residents
U.S. Representative (NY-17)Michael Lawler (R)202-225-6506100%
U.S. SenatorCharles E. Schumer (D)202-224-6542 · contact formstatewide
U.S. SenatorKirsten E. Gillibrand (D)202-224-4451 · contact formstatewide
State Senator (State Senate District 40)Pete Harckham (Democratic/Working Families)914-241-4600100%
Assembly Member (Assembly District 94)Matt Slater (Republican/Conservative)845-278-2923100%
Assembly Member (Assembly District 93)Chris Burdick (Democratic/Independence/Working Families)914-244-44500.4%

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

State legislative districts

State senate districtShare of ZIP residents
State Senate District 40100%

State house districtShare of ZIP residents
Assembly District 94100%
Assembly District 930.4%

Voting precincts

19 voting precincts overlap ZIP 10509. Map them, with each precinct's share of the ZIP's residents.

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ZIP 10509 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.