ZIP code 21029 is in Columbia (44% of residents) and Fulton (1.0%), in Howard County, Maryland. 55% of its residents live outside city limits. It is in Maryland's 3rd congressional district. Its state senate districts are State Senate District 9 (64%) and State Senate District 13 (36%); its state house districts are State Legislative Subdistrict 9A (64%) and State Legislative District 13 (36%).
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).
7 voting precincts overlap ZIP 21029.
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://boundarymcp.com/mcp to Claude, ChatGPT, Cursor or Codex (free, no key; how), then:
related_geographies(id="us:zcta:21029")
ZIP 21029 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.