About Benton County

Population 210,224 residents
Area 1,760 square miles
County Seat Prosser
Established 1905
Named After Missouri Senator Thomas

Benton County is located in southeastern Washington State, situated along the Columbia River in the heart of the Columbia Basin. Benton County seat is Prosser, though the largest city is Kennewick, which forms part of the Tri-Cities metropolitan area alongside Richland and Pasco. Established in 1905 from parts of Yakima and Klickitat counties, Benton County was named after Missouri Senator Thomas Hart Benton. Benton County covers approximately 1,760 square miles and has a population of over 210,000 residents, making it one of the fastest-growing counties in Washington State. Benton County is renowned for its wine production, with over 50 wineries located within the Yakima Valley and Red Mountain AVAs. The Hanford Site, a decommissioned nuclear production complex, occupies a significant portion of Benton County and is undergoing one of the world's largest environmental cleanup projects. Major landmarks include the Columbia River, Sacajawea State Park, and the Reach Museum. Benton County's economy is driven by agriculture (particularly wine grapes, cherries, and wheat), energy production, research facilities at Pacific Northwest National Laboratory, and healthcare. Public records in Benton County are maintained by several offices: the County Auditor's Office (serving as Recorder) at 620 Market Street, Prosser, WA 99350; the Superior Court Clerk at Benton County Justice Center in Kennewick; and the Assessor's Office at 620 Market Street, Prosser. Benton County experiences a semi-arid climate with hot, dry summers and mild winters, making it ideal for viticulture and agriculture.

620 Market Street, Prosser, WA 99350

Court Records & Case Information

The Benton County Superior Court serves Benton County and is located at 7122 W Okanogan Pl in Kennewick. The court handles civil, criminal, family, and probate cases for this county. Court records and case filings can be requested in person or through the Washington online court portal.

The Benton County Superior Court in Benton County has jurisdiction over all civil and criminal cases arising within the county, including family law, probate, small claims, and felony proceedings. Appeals from lower courts are also heard at this level. Case records are maintained by the local Clerk of Courts and are accessible to the public under Washington open records law.

Sheriff, Police & Law Enforcement

Law Enforcement & Arrests

  • The facility typically houses around 300 inmates and provides booking information including mugshots for people currently incarcerated.
  • To request arrest records, citizens can submit a public disclosure request to the Sheriff's Office or the specific police department that made the arrest.
  • Most agencies accept written requests via mail, email, or in-person submission.
  • Requests should include as much identifying information as possible, including the individual's name, date of birth, and approximate date of arrest.
  • Mugshots and booking photos are typically available through the jail's online inmate lookup system for current detainees, though historical mugshot records may require a formal public records request.

Criminal, Arrest & Jail Records

Courts & Case Records

  • Court records in Benton County can be searched through the Washington State Courts online system and through Benton County Superior Court's case search portal.
  • Fees for copies typically include $0.50 per page for standard documents and $5.00 for certification.
  • Many recent case filings can be viewed through the statewide LINX system, though some older records may only be available by in-person request.
  • Remote access to detailed case information may require a registered account.
  • The Clerk's office accepts requests by mail, in person, or through their online portal, and certified copies of judgments, decrees, and other court documents can be obtained for legal purposes.

Property & Public Records

  • Images of recorded documents can typically be viewed and printed directly from the online system at no charge, though certified copies require a fee of $5.00 for the first page and $1.00 for each additional page.
  • Property tax information is maintained separately by Benton County Assessor's Office at 620 Market Street, Prosser, WA 99350 (phone: 509-736-3071).
  • The Assessor's website provides a free online property search tool where users can look up parcel information, assessed values, property characteristics, sales history, and current tax status.
  • Benton County maintains a full Geographic Information System (GIS) portal that provides interactive mapping, aerial photography, zoning information, and detailed parcel data accessible at no cost.
  • Recording fees for new documents are $222 for the first page and $1.00 for each additional page for most standard documents.
620 Market Street, Prosser, WA 99350 • Phone: 509-736-3085

Vital Records

Vital records for this county include birth, death, marriage, and divorce certificates issued under state vital statistics law.

  • Processing time is typically 2-4 weeks when ordered by mail, though in-person requests at the Auditor's office may be processed more quickly if records are available.
  • Death certificates follow the same process and fee structure as birth certificates.
  • Marriage certificates (proof of a completed marriage) cost $25 for certified copies.
  • The Washington State Department of Health offers online ordering through VitalChek for an additional convenience fee, with expedited processing available.
620 Market Street, Prosser, WA 99350

Business & Licensing

Business records, licenses, and permits for this county are processed by the County Clerk and local government offices.

  • This searchable database provides information on business entity status, registered agents, formation dates, annual report compliance, and officers/directors.
  • Building permits, development permits, and zoning information are handled by Benton County Planning & Building Department, located at 7320 West Quinault Avenue, Building B, Kennewick, WA 99336 (phone: 509-736-3070).
620 Market Street, Prosser, WA 99350 • Phone: 509-736-3070

Frequently Asked Questions

How can I search for someone recently arrested in Benton County, Washington?
To search for someone recently arrested in Benton County, Washington, you can use the Benton County Jail Inmate Roster. The this county Jail is located in Kennewick, and the roster is available online through the Sheriff's Office website. This tool allows you to search for inmates by name and provides information on their charges, booking dates, and bond amounts.
Mugshots and booking photos for Benton County, Washington, can be accessed through the Benton County Sheriff's Office. These images are typically available on their official website under the inmate roster section. For further assistance, you can contact the Sheriff's Office directly at their Kennewick location.
To obtain a criminal background check in Benton County, Washington, you should contact the Washington State Patrol's Criminal History Records Section. The process involves submitting a request through their WATCH (Washington Access to Criminal History) system. This service provides access to conviction records and is the official method for obtaining background checks in the state.
To look up sex offenders in Benton County, Washington, you can use the Washington State Sex Offender Information Center. This registry is managed by the Washington Association of Sheriffs and Police Chiefs and provides a searchable database of registered sex offenders. You can search by name, address, or proximity to a specific location.
You can register to vote in Benton County through the Washington Secretary of State's online portal at voter.votewa.gov, by mail, or in person at the Benton County Auditor's Office Elections Division at 620 Market Street in Prosser. The deadline for online and mail registration is 8 days before Election Day, though same-day registration is available in person through Election Day. Washington is a universal vote-by-mail state, so registered voters automatically receive ballots mailed to their address approximately three weeks before each election, with ballot drop boxes available throughout the county.
Property records in Benton County can be searched through the Benton County Auditor's Office online document search system at www.bentoncoWashington.gov/auditor, where you can find recorded deeds, mortgages, liens, and other land records free of charge. For property tax information, assessments, and parcel details, visit the Benton Assessor's website, which offers a free searchable database and interactive GIS mapping system. Both offices are located at 620 Market Street in Prosser, and most records can be viewed online without charge, though certified copies require fees of $5 for the first page and $1 for additional pages.
Birth and death certificates for events occurring in Benton County can be requested through the Benton County Auditor's Office at 620 Market Street, Prosser, WA 99350, or through the Washington State Department of Health Center for Health Statistics in Olympia. The fee is $25 for the first certified copy and $20 for each additional copy ordered simultaneously. Processing takes 2-4 weeks by mail, though in-person requests at the Auditor's office may be faster. Online ordering is available through VitalChek (the state's vendor) for an additional convenience fee, and you must provide valid identification and demonstrate you are an authorized requestor under RCW 70.58A.
Business entity information for corporations and LLCs can be searched free through the Washington Secretary of State's online database at www.sos.wa.gov/corps, which provides formation details, registered agents, and annual report status. For local business licenses in unincorporated Benton County, contact the Benton County Auditor's Office at (509) 736-3085, while city business licenses are issued by individual municipalities (Kennewick, Richland, Prosser, West Richland). Most business licensing in Washington is handled through the state's Business Licensing Service at bls.dor.wa.gov, which centralizes state and local license applications.

Nearby Counties

Yakima County WA Grant County WA Franklin County WA Umatilla County OR Walla County WA Klickitat County WA Morrow County OR