Boundary Atlas

ZIP code 19333: Tredyffrin, PA

ZIP code 19333 is in Devon (18% of residents) and Berwyn (10%), in Chester County, Pennsylvania. 72% of its residents live outside city limits. It is in Pennsylvania's 6th congressional district. Its state senate district is State Senate District 19; its state house district is State House District 157.

7,734residents (2020 Census)
3.7 sq miland area
2cities and towns
1congressional district
8voting precincts

See it on the mapAll of Pennsylvania

City and county

City or townShare of ZIP residents
Devon18%
Berwyn10%

CountyShare of ZIP residents
Chester County100%

Town or county subdivisionShare of ZIP residents
Tredyffrin township54%
Easttown township46%

Congressional district

Congressional districtShare of ZIP residents
Pennsylvania's 6th congressional district (PA-06)100%

Elected officials

OfficeMemberContactShare of residents
U.S. Representative (PA-06)Chrissy Houlahan (D)202-225-4315100%
U.S. SenatorDavid McCormick (R)202-224-6324 · contact formstatewide
U.S. SenatorJohn Fetterman (D)202-224-4254 · contact formstatewide
State Senator (State Senate District 19)Carolyn Comitta (Democratic)610-692-2112100%
State Representative (State House District 157)Melissa Shusterman (Democratic)484-200-8260100%

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 19100%

State house districtShare of ZIP residents
State House District 157100%

Voting precincts

8 voting precincts overlap ZIP 19333. Map them, with each precinct's share of the ZIP's residents.

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ZIP 19333 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.