Washington's 4th congressional district (WA-04)
Washington's 4th congressional district (WA-04) covers parts or all of 8 counties, including Benton County, Grant County, Klickitat County, Okanogan County, Yakima County and Douglas County, and 93 ZIP codes (80 wholly inside it). Its 2020 population was 768,710. This is the map in force for the November 3, 2026 election.
Who represents WA-04
| Office | Member | Contact |
|---|---|---|
| U.S. Representative (WA-04) | Dan Newhouse (R) | 202-225-5816 |
| 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-04 |
|---|---|
| Benton County | 100% |
| Grant County | 100% |
| Klickitat County | 100% |
| Okanogan County | 100% |
| Yakima County | 100% |
| Douglas County | 99% |
| Franklin County | 86% |
| Adams County | 75% |
ZIP codes
Percentages mark ZIPs only partly in WA-04: the share of that ZIP's residents inside it.
- 98602
- 98605 (65%)
- 98613
- 98617
- 98619
- 98620
- 98623
- 98628
- 98635
- 98650
- 98670
- 98672 (98%)
- 98673
- 98802 (98%)
- 98812
- 98813
- 98814
- 98816 (0.6%)
- 98819
- 98823
- 98824
- 98827
- 98829
- 98830
- 98832 (94%)
- 98833
- 98834
- 98837
- 98840
- 98841
- 98843
- 98844
- 98845
- 98846 (99%)
- 98848
- 98849
- 98850
- 98851
- 98853
- 98855
- 98856
- 98857 (92%)
- 98858
- 98859
- 98860
- 98862
- 98901 (100%)
- 98902
- 98903
- 98908
- 98921
- 98923
- 98930
- 98932
- 98933
- 98935
- 98936
- 98937
- 98938
- 98939
- 98942
- 98944
- 98947
- 98948
- 98951
- 98952
- 98953
- 99103 (7.3%)
- 99115
- 99116
- 99123
- 99124
- 99133 (81%)
- 99135
- 99155
- 99166 (1.9%)
- 99301 (98%)
- 99320
- 99321
- 99322
- 99336
- 99337
- 99338
- 99344 (92%)
- 99345
- 99346
- 99349
- 99350
- 99352
- 99353
- 99354
- 99356
- 99357
Towns
Benton City CCD, Brewster-Wakefield CCD, Bridgeport CCD, Colville Reservation CCD, Conconully-Riverside CCD, Coulee City CCD, Dallesport-Klickitat CCD, Early Winters CCD, Ephrata-Soap Lake CCD, George CCD, Gloyd CCD, Goldendale CCD, Grand Coulee CCD, Hanford Site CCD, Horse Heaven Hills Plateau CCD, Mabton CCD, Mattawa-Royal City CCD, Methow Valley CCD, Moses Lake CCD, Northeast Yakima CCD, Northwest Benton CCD, Northwest Yakima CCD, Okanogan CCD, Omak CCD, Oroville CCD, Pasco CCD, Quincy CCD, Richland-Kennewick CCD, South Benton CCD, South Yakima CCD, Sunnyside CCD, Tonasket CCD, Toppenish-Wapato CCD, Warden CCD, Waterville CCD, White Salmon CCD, Wilson Creek CCD, Yakama Nation Reservation CCD, Yakima CCD and East Wenatchee CCD and others.
Get this in your AI agent
Your agent can draw every precinct in WA-04, 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:5304", children_level="precinct", include_districts=True)