ZIP code 98198: Des Moines, WA
ZIP code 98198 is in Des Moines (80% of residents) and SeaTac (20%), in King County, Washington. It is in Washington's 9th congressional district (100%) and Washington's 7th congressional district (0.5%). Its state senate districts are Legislative (Senate) District 33 (93%) and Legislative (Senate) District 30 (6.6%); its state house districts are Legislative (House) District 33 (93%) and Legislative (House) District 30 (6.6%).
See it on the mapAll of Washington
City and county
| City or town | Share of ZIP residents |
|---|---|
| Des Moines | 80% |
| SeaTac | 20% |
| Normandy Park | 0.5% |
| County | Share of ZIP residents |
|---|---|
| King County | 100% |
| Town or county subdivision | Share of ZIP residents |
|---|---|
| Seattle CCD | 88% |
| Federal Way-Auburn CCD | 12% |
Congressional districts
| Congressional district | Share of ZIP residents |
|---|---|
| Washington's 9th congressional district (WA-09) | 100% |
| Washington's 7th congressional district (WA-07) | 0.5% |
This ZIP is split between districts. A mailing address in it could be in either; the map or locate_point gives the district for an exact address.
Elected officials
| Office | Member | Contact | Share of residents |
|---|---|---|---|
| Mayor | Matt Mahoney | 80% | |
| U.S. Representative (WA-09) | Adam Smith (D) | 202-225-8901 | 100% |
| U.S. Representative (WA-07) | Pramila Jayapal (D) | 202-225-3106 | 0.5% |
| U.S. Senator | Maria Cantwell (D) | 202-224-3441 · contact form | statewide |
| U.S. Senator | Patty Murray (D) | 202-224-2621 · contact form | statewide |
| State Senator (Legislative (Senate) District 33) | Tina Orwall (Democratic) | 93% | |
| State Senator (Legislative (Senate) District 30) | Claire Wilson (Democratic) | 6.6% | |
| State Representative (Legislative (House) District 33) | Edwin Obras (Democratic) | 93% | |
| State Representative (Legislative (House) District 33) | Mia Gregerson (Democratic) | 93% | |
| State Representative (Legislative (House) District 30) | Jamila Taylor (Democratic) | 6.6% | |
| State Representative (Legislative (House) District 30) | Kristine Reeves (Democratic) | 6.6% |
From Wikidata (community-maintained); confirm on the city's website.
Officials serving now (members of Congress until January 3, 2027). Sources: State legislators: Open States (public domain); Members of Congress: the @unitedstates project, congress-legislators (CC0); Mayors: Wikidata (CC0).
Local government
- Des Moines website: https://desmoineswa.gov
- Des Moines laws: search for the Des Moines, Washington code of ordinances
- SeaTac website: https://www.seatacwa.gov/
- SeaTac laws: search for the SeaTac, Washington code of ordinances
- King County website: https://kingcounty.gov
- King County laws: search for the King County, Washington code of ordinances
State legislative districts
| State senate district | Share of ZIP residents |
|---|---|
| Legislative (Senate) District 33 | 93% |
| Legislative (Senate) District 30 | 6.6% |
| State house district | Share of ZIP residents |
|---|---|
| Legislative (House) District 33 | 93% |
| Legislative (House) District 30 | 6.6% |
Voting precincts
48 voting precincts overlap ZIP 98198. 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:98198")
ZIP 98198 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.