Washington's 9th congressional district (WA-09)
Washington's 9th congressional district (WA-09) lies within King County, and 35 ZIP codes (14 wholly inside it). Its 2020 population was 768,838. This is the map in force for the November 3, 2026 election.
768,838residents (2020 Census)
1counties
35ZIP codes
855voting precincts
Who represents WA-09
| Office | Member | Contact |
|---|---|---|
| U.S. Representative (WA-09) | Adam Smith (D) | 202-225-8901 |
| U.S. Senator | Maria Cantwell (D) | 202-224-3441 · contact form |
| U.S. Senator | Patty Murray (D) | 202-224-2621 · contact form |
Officials serving now (members of Congress until January 3, 2027). Sources: Members of Congress: the @unitedstates project, congress-legislators (CC0).
Counties
| County | Share of the county's residents in WA-09 |
|---|---|
| King County | 34% |
ZIP codes
Percentages mark ZIPs only partly in WA-09: the share of that ZIP's residents inside it.
- 98001
- 98002 (79%)
- 98003
- 98004 (17%)
- 98005 (55%)
- 98006
- 98007 (47%)
- 98008 (39%)
- 98023
- 98030 (79%)
- 98031 (94%)
- 98032
- 98040
- 98042 (0.6%)
- 98047 (99%)
- 98055
- 98056
- 98057
- 98058 (64%)
- 98059 (71%)
- 98092 (10%)
- 98104 (49%)
- 98108 (76%)
- 98118
- 98122 (40%)
- 98134 (23%)
- 98144
- 98148 (21%)
- 98158
- 98168 (43%)
- 98178
- 98188
- 98198 (100%)
- 98354 (19%)
- 98422 (0.2%)
Towns
Federal Way-Auburn CCD, Seattle East CCD, Seattle CCD, Enumclaw Plateau CCD and Tahoma-Maple Valley CCD.
Get this in your AI agent
Your agent can draw every precinct in WA-09, or list them with population shares (related_geographies). Add https://boundarymcp.com/mcp to Claude, ChatGPT, Cursor or Codex (free, no key; how), then:
get_boundaries(id="us:congressional_district:5309", children_level="precinct", include_districts=True)