ZIP code 60657 is in Chicago, in Cook County, Illinois. It is in Illinois's 5th congressional district. Its state senate districts are State Senate District 6 (96%) and State Senate District 20 (3.6%); its state house districts are State House District 11 (57%), State House District 12 (39%) and State House District 40 (3.6%).
Officials serving now (members of Congress until January 3, 2027). Sources: Mayors: Open States (public domain); State legislators: Open States (public domain); Members of Congress: the @unitedstates project, congress-legislators (CC0).
39 voting precincts overlap ZIP 60657.
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:60657")
ZIP 60657 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.