Boundary Atlas

ZIP code 99348: Prescott, WA

ZIP code 99348 is in Prescott (22% of residents), in Walla Walla County (99%) and Columbia County (1.1%), Washington. 78% of its residents live outside city limits. It is in Washington's 5th congressional district. Its state senate districts are Legislative (Senate) District 16 (99%) and Legislative (Senate) District 9 (1.1%); its state house districts are Legislative (House) District 16 (99%) and Legislative (House) District 9 (1.1%).

1,685residents (2020 Census)
534.3 sq miland area
1cities and towns
1congressional district
9voting precincts

See it on the mapAll of Washington

City and county

City or townShare of ZIP residents
Prescott22%

CountyShare of ZIP residents
Walla Walla County99%
Columbia County1.1%

Town or county subdivisionShare of ZIP residents
Eureka Flat CCD95%
Waitsburg CCD3.6%
Starbuck CCD1.1%

Congressional district

Congressional districtShare of ZIP residents
Washington's 5th congressional district (WA-05)100%

Elected officials

OfficeMemberContactShare of residents
U.S. Representative (WA-05)Michael Baumgartner (R)202-225-2006100%
U.S. SenatorMaria Cantwell (D)202-224-3441 · contact formstatewide
U.S. SenatorPatty Murray (D)202-224-2621 · contact formstatewide
State Senator (Legislative (Senate) District 16)Perry Dozier (R)99%
State Senator (Legislative (Senate) District 9)Mark Schoesler (R)1.1%
State Representative (Legislative (House) District 16)Mark Klicker (R)99%
State Representative (Legislative (House) District 16)Skyler Rude (R)99%
State Representative (Legislative (House) District 9)Joe Schmick (R)1.1%
State Representative (Legislative (House) District 9)Mary Dye (R)1.1%

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

State legislative districts

State senate districtShare of ZIP residents
Legislative (Senate) District 1699%
Legislative (Senate) District 91.1%

State house districtShare of ZIP residents
Legislative (House) District 1699%
Legislative (House) District 91.1%

Voting precincts

9 voting precincts overlap ZIP 99348. Map them, with each precinct's share of the ZIP's residents.

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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:99348")

ZIP 99348 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.