ZIP code 21702 is in Frederick (79% of residents) and Braddock Heights (1.7%), in Frederick County, Maryland. 19% of its residents live outside city limits. It is in Maryland's 6th congressional district. Its state senate districts are State Senate District 3 (89%) and State Senate District 4 (11%); its state house districts are State Legislative District 3 (89%) and State Legislative District 4 (11%).
Members serving now (119th Congress, until January 3, 2027). Source: Members of Congress: the @unitedstates project, congress-legislators (CC0).
State legislative districts
State senate district
Share of ZIP residents
State Senate District 3
89%
State Senate District 4
11%
State house district
Share of ZIP residents
State Legislative District 3
89%
State Legislative District 4
11%
Voting precincts
14 voting precincts overlap ZIP 21702.
Map them, with each precinct's share of the ZIP's residents.
Get this in your AI agent
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:21702")
ZIP 21702 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.