Boundary Atlas

ZIP code 21829: Girdletree, MD

ZIP code 21829 is in Girdletree (29% of residents), in Worcester County, Maryland. 71% of its residents live outside city limits. It is in Maryland's 1st congressional district. Its state senate district is State Senate District 38; its state house district is State Legislative Subdistrict 38A.

479residents (2020 Census)
16.8 sq miland area
1cities and towns
1congressional district
2voting precincts

See it on the mapAll of Maryland

City and county

City or townShare of ZIP residents
Girdletree29%

CountyShare of ZIP residents
Worcester County100%

Town or county subdivisionShare of ZIP residents
District 2, Central51%
District 1, Southern49%

Congressional district

Congressional districtShare of ZIP residents
Maryland's 1st congressional district (MD-01)100%

State legislative districts

State senate districtShare of ZIP residents
State Senate District 38100%

State house districtShare of ZIP residents
State Legislative Subdistrict 38A100%

Voting precincts

2 voting precincts overlap ZIP 21829. 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:

related_geographies(id="us:zcta:21829")

ZIP 21829 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.