Boundary Atlas

ZIP code 01890: Winchester, MA

ZIP code 01890 is in Winchester, in Middlesex County, Massachusetts. It is in Massachusetts's 5th congressional district. Its state senate districts are Fifth Middlesex District (51%) and Second Middlesex District (49%); its state house districts are 31st Middlesex District (88%) and 15th Middlesex District (12%).

22,970residents (2020 Census)
6.0 sq miland area
1cities and towns
1congressional district
8voting precincts

See it on the mapAll of Massachusetts

City and county

City or townShare of ZIP residents
Winchester100%

CountyShare of ZIP residents
Middlesex County100%

Town or county subdivisionShare of ZIP residents
Winchester town100%

Congressional district

Congressional districtShare of ZIP residents
Massachusetts's 5th congressional district (MA-05)100%

Elected officials

OfficeMemberContactShare of residents
U.S. Representative (MA-05)Katherine M. Clark (D)202-225-2836100%
U.S. SenatorEdward J. Markey (D)202-224-2742 · contact formstatewide
U.S. SenatorElizabeth Warren (D)202-224-4543 · contact formstatewide
State Senator (Fifth Middlesex District)Jason Lewis (Democratic)51%
State Senator (Second Middlesex District)Pat Jehlen (Democratic)49%
State Representative (31st Middlesex District)Mike Day (Democratic)88%
State Representative (15th Middlesex District)Michelle Ciccolo (Democratic)12%

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
Fifth Middlesex District51%
Second Middlesex District49%

State house districtShare of ZIP residents
31st Middlesex District88%
15th Middlesex District12%

Voting precincts

8 voting precincts overlap ZIP 01890. Map them, with each precinct's share of the ZIP's residents.

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ZIP 01890 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.