Benton County, Washington Genealogy

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United States Gotoarrow.png Washington Gotoarrow.png Benton County

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Online Records

Benton County, Washington
Map of Washington highlighting Benton County
Location in the state of Washington
Map of the U.S. highlighting Washington
Location of Washington in the U.S.
Founded March 8, 1905
County Seat Prosser
Address Benton County Courthouse
600 Market Street
Prosser, WA 99350-0190
Phone: 509.786.5624
Adams County Website

Historical Facts

Boundary Changes

  • No counties created from the county.

Record Loss


Bible Records



The links are to volunteer submitted tombstone lists and may be incomplete. In addition to these links try USGenWeb Tombstone Project - Benton County, Washington for tombstone lists and photos.


Nearest Town
Desert Lawn Memorial Park
1401 South Union St., Kennewick
Evergreen Cemetery
Benton City
Horn Road, Benton City
Horse Heaven Hills Cemetery
Benton City
Cemetery Rd. between Travis Rd and Clodius Rd, Prosser (11 miles south of Benton City)
Paterson Cemetery

Prosser Cemetery
1601 Paterson Avenue, PO Box 1439, Prosser
Resthaven Cemetery (Find a Grave), Resthaven Cemetery (BillionGraves)
Williams Blvd between Goethals Dr and Kimball Ave in RIchland
Riverview Heights Cemetery
1200 S. Olympia, Kennewick
Sunset Memorial Cemetery (Findagrave) Sunset Memorial Cemetery (BillionGraves)
915 By-Pass-Highway, Richland
West Prosser (IOOF) Cemetery
Richards Rd and Byron Rd, west of Prosser
White Bluffs Cemetery
of White Bluffs, currently in Prosser

When White Bluffs was depopulated for the Hanford Project the 133 caskets were moved to the Prosser Cemetery.


  • 1910
  • 1920
  • 1930
  • 1940

Church Records

Court Records

Ethnic, Political and Religious Groups




Land and Property




Naturalization and Citizenship

Washington State Digital Archives has digitized various types of naturalization-related records, including declarations of intentions, delayed birth files, naturalization affidavits, notifications of application for admission to US citizenship, orders fixing naturalization terms, petitions and records, petitions, receipts for certificates of citizenship, record of final decrees of citizenship and record of petitions dockets. Depending on the county, records range from 1854-1988.





Public Records



Benton County Courthouse
600 Market Street
Prosser, WA 99350-0190
Phone: 509.786.5624

County Auditor has birth records 1905-1907
and marriage records from 1905.
County Clerk has divorce, probate and court records.
County Assessor has land records. [2]

Family History Centers
  • Mid-Columbia Library System has many books of genealogical value, maps, and many local newspapers on microfilm dating from the late 1800s to the present. In the library there is also access to online databases and volunteers from the TCGS.

  • Richland Public Library has access to online databases, some books of genealogical value, and the local Tri-City Herald newspaper on microfilm.
  • East Benton County Historical Society primarily runs a museum of local history and a research library. The museum features local history, from the ancient petrified forests to the Native Americans to the pioneers and settlers. Of special note is an extensive photograph collection depicting life in Kennewick, Richland, Finley, Hover, Hanford, White Bluffs and surrounding areas. "The museum library houses an extensive collection of materials including obituaries, local history files, family history information, high school annuals and books of local and regional interest. There are also 121 books from Dr. Glen Axford's Audubon Collection." (From the website under Museum Info: Research Library)

  • The Tri-City Genealogical Society has an extensive collection of local and regional resources as well as references for other areas. Check their resources page for an updated list of their holdings. They also provide genealogical help at the Mid-Columbia Library, have online resources, and conduct local research for a small fee.


Vital Records

  • Washington State Digital Archives has a database of Benton County Birth Records. This database contains the names of people who were born in Benton County from 1905-1907. For FHL entries, 1905-1907, click here.
  • Washington State Digital Archives has a database of Benton County Marriages from 1905 to 1920. This database is an index to marriage certificates filed with the Auditor in Benton County, Washington. For FHL entries, click here.
  • Washington Death Certificates 1907-1960 A free internet index to the 1907-1960 death certificates can be found at FamilySearch Record Search, no images are available. A transcribed death certificate may contain such information as name of the deceased, date and place of death, age, gender, birth date and birth place, mother’s maiden name and name of spouse, place of residence, occupation and certificate numbers.




  • Benton City
  • Kennewick
  • Prosser
  • Richland
  • West Richland


  • Finley
  • Highland
  • Kiona
  • Paterson

Extinct Communities

  • Hanford
  • White Bluffs
  • Richland (Original Site)


  1. The Handybook for Genealogists: United States of America,10th ed. (Draper, UT:Everton Publishers, 2002).
  2. Handybook for Genealogists: United States of America, 10th ed. (Draper, Utah: Everton Pub., 2002), Benton County, Washington page 732, At various libraries (WorldCat); FHL Book 973 D27e 2002.