Boundary Atlas

ZIP code 01778: Cochituate, MA

ZIP code 01778 is in Cochituate (49% of residents), in Middlesex County, Massachusetts. 51% of its residents live outside city limits. It is in Massachusetts's 5th congressional district. Its state senate districts are Middlesex and Worcester District (99%) and Middlesex and Norfolk District (1.3%); its state house districts are 13th Middlesex District (51%) and 5th Middlesex District (49%).

14,132residents (2020 Census)
15.0 sq miland area
1cities and towns
1congressional district
5voting precincts

See it on the mapAll of Massachusetts

City and county

City or townShare of ZIP residents
Cochituate49%

CountyShare of ZIP residents
Middlesex County100%

Town or county subdivisionShare of ZIP residents
Wayland town99%
Natick town1.3%

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 (Middlesex and Worcester District)Jamie Eldridge (Democratic)99%
State Senator (Middlesex and Norfolk District)Karen Spilka (Democratic)1.3%
State Representative (13th Middlesex District)Carmine Gentile (Democratic)51%
State Representative (5th Middlesex District)David Linsky (Democratic)49%

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
Middlesex and Worcester District99%
Middlesex and Norfolk District1.3%

State house districtShare of ZIP residents
13th Middlesex District51%
5th Middlesex District49%

Voting precincts

5 voting precincts overlap ZIP 01778. Map them, with each precinct's share of the ZIP's residents.

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ZIP 01778 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.