ZIP code 21075 is in Elkridge (59% of residents), Ilchester (38%) and Columbia (2.3%), in Howard County, Maryland. It is in Maryland's 3rd congressional district. Its state senate districts are State Senate District 12 (59%) and State Senate District 13 (41%); its state house districts are State Legislative Subdistrict 12A (59%) and State Legislative District 13 (41%).
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).
11 voting precincts overlap ZIP 21075.
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:21075")
ZIP 21075 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.