ZIP code 99003: Spokane County, WA
ZIP code 99003 is in Spokane County, Washington, outside any city or Census-designated place. It is in Washington's 5th congressional district. Its state senate districts are Legislative (Senate) District 4 (72%) and Legislative (Senate) District 6 (28%); its state house districts are Legislative (House) District 4 (72%) and Legislative (House) District 6 (28%).
See it on the mapAll of Washington
City and county
Outside any city or Census-designated place.
| County | Share of ZIP residents |
|---|---|
| Spokane County | 100% |
| Town or county subdivision | Share of ZIP residents |
|---|---|
| Colbert CCD | 50% |
| Deer Park CCD | 50% |
Congressional district
| Congressional district | Share of ZIP residents |
|---|---|
| Washington's 5th congressional district (WA-05) | 100% |
Elected officials
| Office | Member | Contact | Share of residents |
|---|---|---|---|
| U.S. Representative (WA-05) | Michael Baumgartner (R) | 202-225-2006 | 100% |
| 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 4) | Leonard Christian (R) | 72% | |
| State Senator (Legislative (Senate) District 6) | Jeff Holy (R) | 509-456-2747 | 28% |
| State Representative (Legislative (House) District 4) | Rob Chase (R) | 72% | |
| State Representative (Legislative (House) District 4) | Suzanne Schmidt (R) | 72% | |
| State Representative (Legislative (House) District 6) | Jenny Graham (R) | 28% | |
| State Representative (Legislative (House) District 6) | Mike Volz (R) | 28% |
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).
Local government
- Spokane County website: http://www.spokanecounty.org
- Spokane County laws: search for the Spokane County, Washington code of ordinances
State legislative districts
| State senate district | Share of ZIP residents |
|---|---|
| Legislative (Senate) District 4 | 72% |
| Legislative (Senate) District 6 | 28% |
| State house district | Share of ZIP residents |
|---|---|
| Legislative (House) District 4 | 72% |
| Legislative (House) District 6 | 28% |
Voting precincts
12 voting precincts overlap ZIP 99003. 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:99003")
ZIP 99003 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.