ZIP code 20148 is in Brambleton (38% of residents), Broadlands (21%), Loudoun Valley Estates (17%) and Moorefield (7.1%), in Loudoun County, Virginia. 16% of its residents live outside city limits. It is in Virginia's 10th congressional district. Its state senate districts are State Senate District 32 (91%) and State Senate District 31 (9.2%); its state house districts are House of Delegates District 26 (63%), House of Delegates District 28 (22%), House of Delegates District 29 (7.8%), House of Delegates District 30 (4.5%) and House of Delegates District 27 (3.5%).
18 voting precincts overlap ZIP 20148.
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:20148")
ZIP 20148 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.