ZIP code 21117 is in Owings Mills (60% of residents), Reisterstown (10.0%) and Garrison (9.9%), in Baltimore County, Maryland. 20% of its residents live outside city limits. It is in Maryland's 2nd congressional district. Its state senate districts are State Senate District 11 (71%) and State Senate District 10 (29%); its state house districts are State Legislative Subdistrict 11A (65%), State Legislative District 10 (29%) and State Legislative Subdistrict 11B (6.2%).
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).
21 voting precincts overlap ZIP 21117.
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:21117")
ZIP 21117 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.