ZIP code 98178 is in Bryn Mawr-Skyway (67% of residents), Seattle (26%), Tukwila (6.3%) and Renton (1.1%), in King County, Washington. It is in Washington's 9th congressional district. Its state senate districts are Legislative (Senate) District 37 (93%) and Legislative (Senate) District 11 (7.4%); its state house districts are Legislative (House) District 37 (93%) and Legislative (House) District 11 (7.4%).
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).
35 voting precincts overlap ZIP 98178.
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://boundarymcp.com/mcp to Claude, ChatGPT, Cursor or Codex (free, no key; how), then:
related_geographies(id="us:zcta:98178")
ZIP 98178 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.