Prosser, Washington
Prosser is a city in Benton County, Washington, with 6,247 residents in 2020. It is in Washington's 4th congressional district. Its state senate district is Legislative (Senate) District 15; its state house district is Legislative (House) District 15.
County
| County | Share of residents |
|---|---|
| Benton County | 100% |
Congressional district
| Congressional district | Share of residents |
|---|---|
| Washington's 4th congressional district (WA-04) | 100% |
Elected officials
| Office | Member | Contact | Share of residents |
|---|---|---|---|
| U.S. Representative (WA-04) | Dan Newhouse (R) | 202-225-5816 | 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 15) | Nikki Torres (R) | 100% | |
| State Representative (Legislative (House) District 15) | Chris Corry (R) | 100% | |
| State Representative (Legislative (House) District 15) | Jeremie Dufault (R) | 100% |
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
- Prosser website: https://cityofprosser.com
- Prosser laws: search for the Prosser, Washington code of ordinances
- Benton County website: https://www.co.benton.wa.us/
- Benton County laws: search for the Benton County, Washington code of ordinances
State legislative districts
| State senate district | Share of residents |
|---|---|
| Legislative (Senate) District 15 | 100% |
| State house district | Share of residents |
|---|---|
| Legislative (House) District 15 | 100% |
ZIP codes
Percentages mark ZIPs only partly in Prosser: the share of that ZIP's residents living in it.
- 99350 (47%)
Get this in your AI agent
Your agent can get Prosser's counties and districts with shares, its ZIP codes (level='zcta'), and its boundary as GeoJSON (get_boundaries). Add https://boundarymcp.com/mcp to Claude, ChatGPT, Cursor or Codex (free, no key; how), then:
related_geographies(id="us:place:5356450")
Prosser here is the Census Bureau's place boundary as of January 1, 2025. Shares are of 2020 Census population. Districts are the maps in force for the November 3, 2026 election.