ZIP code 39042 is in Brandon (64% of residents) and Robinhood (3.8%), in Rankin County (100%) and Smith County (0.1%), Mississippi. 32% of its residents live outside city limits. It is in Mississippi's 3rd congressional district. Its state senate districts are State Senate District 30 (52%), State Senate District 36 (26%) and State Senate District 20 (22%); its state house districts are State House District 60 (58%), State House District 74 (29%), State House District 61 (6.9%), State House District 77 (5.9%) and State House District 79 (0.4%).
20 voting precincts overlap ZIP 39042.
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:39042")
ZIP 39042 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.