ZIP code 39503 is in Gulfport (62% of residents) and Lyman (4.4%), in Harrison County, Mississippi. 33% of its residents live outside city limits. It is in Mississippi's 4th congressional district. Its state senate districts are State Senate District 49 (51%), State Senate District 46 (19%), State Senate District 50 (19%), State Senate District 47 (7.4%) and State Senate District 48 (3.2%); its state house districts are State House District 33 (36%), State House District 121 (21%), State House District 118 (16%), State House District 119 (13%), State House District 95 (13%) and State House District 120 (0.6%).
17 voting precincts overlap ZIP 39503.
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:39503")
ZIP 39503 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.