ZIP code 98355 is in Mineral (31% of residents), in Lewis County, Washington. 69% of its residents live outside city limits. It is in Washington's 3rd congressional district. Its state senate district is Legislative (Senate) District 20; its state house district is Legislative (House) District 20.
Members serving now (119th Congress, until January 3, 2027). Source: Members of Congress: the @unitedstates project, congress-legislators (CC0).
State legislative districts
State senate district
Share of ZIP residents
Legislative (Senate) District 20
100%
State house district
Share of ZIP residents
Legislative (House) District 20
100%
Voting precincts
4 voting precincts overlap ZIP 98355.
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:98355")
ZIP 98355 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.