Boundary Atlas

ZIP code 12123: Nassau, NY

ZIP code 12123 is in Nassau (22% of residents), Nassau Lake (20%) and East Nassau (1.4%), in Rensselaer County (98%) and Columbia County (1.9%), New York. 57% of its residents live outside city limits. It is in New York's 19th congressional district. Its state senate districts are State Senate District 43 (98%) and State Senate District 41 (1.9%); its state house districts are Assembly District 107 (98%) and Assembly District 106 (1.9%).

5,096residents (2020 Census)
31.8 sq miland area
3cities and towns
1congressional district
10voting precincts

See it on the mapAll of New York

City and county

City or townShare of ZIP residents
Nassau22%
Nassau Lake20%
East Nassau1.4%

CountyShare of ZIP residents
Rensselaer County98%
Columbia County1.9%

Town or county subdivisionShare of ZIP residents
Schodack town52%
Nassau town46%
Chatham town1.9%

Congressional district

Congressional districtShare of ZIP residents
New York's 19th congressional district (NY-19)100%

Elected officials

OfficeMemberContactShare of residents
U.S. Representative (NY-19)Josh Riley (D)202-225-5441100%
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 43)Jake Ashby (Republican/Conservative)518-371-275198%
State Senator (State Senate District 41)Michelle Hinchey (Democratic/Working Families)845-331-38101.9%
Assembly Member (Assembly District 107)Scott Bendett (Republican/Conservative)518-272-614998%
Assembly Member (Assembly District 106)Didi Barrett (Democratic)518-828-19611.9%

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 4398%
State Senate District 411.9%

State house districtShare of ZIP residents
Assembly District 10798%
Assembly District 1061.9%

Voting precincts

10 voting precincts overlap ZIP 12123. Map them, with each precinct's share of the ZIP's residents.

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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:

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ZIP 12123 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.