Prosser, WA Public Records
Prosser is an incorporated city in Benton County, Washington, with an estimated population of 6,540 (U.S. Census Bureau, July 2024 estimate) and 5.2 square miles of land. That is up about 403 residents since the 2020 Census base.
🏢 Prosser City Hall
Prosser's own city government keeps its local records: council or board meeting minutes, local ordinances and resolutions, local permits and licenses, and its own budget and contracts. Requests for those records go to the city clerk under the Washington Public Records Act. Birth and death certificates, marriage records, deeds and court files are generally kept by county and state offices rather than by the city; see the offices below.
📇 Prosser Contact on File
| Government | City Of Prosser |
| Mailing address | 601 7th St, Prosser, WA 99350 |
| Phone | Not stated |
| Official website | www.cityofprosser.com |
| Source | U.S. Census Bureau, 2022 Census of Governments: Government Units listing ↗ |
This is the mailing address the government reported to the U.S. Census Bureau; it may be a post office box or the office of an elected official rather than a public counter, and the source does not list a phone number. The website was reported by the government and was answering when we last checked. Call or check the official website before you visit.
↑ Back to record types🏛️ County Courthouse & Records Office for Prosser
Prosser is in Benton County. In Washington, deeds, mortgages and other land records are recorded by the County Auditor or county recording office. Divorce cases in Washington are heard by the Superior Court in each county. Wills and estates in Washington are handled by the Superior Court in each county.
📍 Benton County at a Glance
| County | Benton County |
| County population (2024 est.) | 218,190 Source: www2.census.gov ↗ |
⚖️ Benton County Superior Court
| Address | 7122 W Okanogan Pl, Bldg A, Kennewick, WA 99336-2359 |
| Directions | Get directions ↗ |
| Phone | (509) 736-3071 |
| Hours | Not stated |
| Records available | Superior court cases (civil, felony criminal, family, probate, juvenile) |
| Official website | co.benton.wa.us |
| Sources | courts.wa.gov/…/263.html ↗ |
| Last verified | October 16, 2026 |
📜 Benton County Clerk
| Address | Benton County Justice Center, 7122 W Okanogan Pl, Ste A210, Kennewick, WA 99336-2359, Prosser Courthouse, 620 Market St, Prosser, WA 99350 |
| Directions | Get directions ↗ |
| Phone | (509) 735-8388 |
| Hours | Not stated |
| Records available | Superior court case files and records (the County Clerk is the clerk of the Superior Court) |
| Official website | Not stated |
| Sources | courts.wa.gov/…/263.html ↗ |
| Last verified | October 16, 2026 |
See the full Benton County records page →
↑ Back to record types📋 Where to Get Records for Prosser
Where to get the most-requested public records for people and property in Prosser, WA:
📋 Prosser Records Guide
| Birth & death certificates | Washington State Department of Health – Vital RecordsCertified birth and death certificates for Washington are issued by the state vital records office; in some places a county or local office can also issue copies. |
| Deeds & property records | In Washington, deeds, mortgages and other land records are recorded by the County Auditor or county recording office. |
| Court cases & divorce | Benton County courthouse. Divorce cases in Washington are heard by the Superior Court in each county. |
| Wills & estates | Wills and estates in Washington are handled by the Superior Court in each county. |
| State court system | Washington Courts |
| Sex offender registry | Washington Sex Offender Information (WASPC) |