Washington County, Oklahoma Genealogy

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United States Gotoarrow.png Oklahoma Gotoarrow.png Washington County

Washington County, Oklahoma
Map of Oklahoma highlighting Washington County
Location in the state of Oklahoma
Map of the U.S. highlighting Oklahoma
Location of Oklahoma in the U.S.
Founded 1897
County Seat Bartlesville
Address Washington County Courthouse
420 S. Johnstone Ave.
Bartlesville, Oklahoma 74003-6602
Phone: 918.337.2840

Washington County, Oklahoma genealogy and family history research page. Guide to genealogy, history, and courthouse sources including birth records, marriage records, death records, census records, wills, deeds and land records, Civil War records, family histories, cemeteries, churches, tax records, newspapers, and obituaries.


County Information

Washington County, Oklahoma Record Dates

Beginning Dates for Major County Records
Birth Marriage Death Census Land Probate
1908 1907 1907 1900 1907

County Courthouse

Washington County Courthouse
420 S Johnstone Avenue
Bartlesville, OK 74003-6602
Phone: 918.337-2840

Clerk Court has marriage, divorce, probate and court records from 1907[1]


Parent County

  • 1897--Washington County was created in 1897 from Cherokee Lands
  • County seat: Bartlesville [2]


Washington County is a county located in the northeastern part of the of Oklahoma. Its county seat is Bartlesville. Washington County was named for George Washington. Founded 1907. [3]

Boundary Changes

Record Loss

There is no known history of courthouse disasters in this county.


Populated Places [4]

  • Bartlesville (county seat)
  • Copan
  • Dewey
  • Ochelata
  • Ramona
  • Vera

Neighboring Counties


American Indians


Land and Property


LDS Cemetery Records
Vol. 21 page 64 - Dewey
page 157 - Matoaka

Tombstone Transcriptions Online Tombstone Transcriptions in Print List of Cemeteries in the county
Findagrave.com Family History Library Findagrave.com
OKGenWeb WorldCat Billion Graves
Tombstone Project
Oklahoma Gravestones
Oklahoma Cemeteries
Billion Graves
See Oklahoma Cemeteries for more information.


Historical populations
Census Pop.  %±
1910 17,484
1920 27,002 54.4%
1930 2,777 −89.7%
1940 30,559 1000.4%
1950 32,880 7.6%
1960 42,347 28.8%
1970 42,277 −0.2%
1980 48,113 13.8%
1990 48,066 −0.1%
2000 48,996 1.9%
2010 50,976 4.0%
Source: "Wikipedia.org".

For tips on accessing Washington County, Oklahoma Genealogy census records online, see: Oklahoma Census.

State Census Records
Federal Census Records

Federal Censuses were taken for Oklahoma starting in 1860. For links to Federal census indexes, see Oklahoma Census.


Church records vary significantly depending on the denomination and the record keeper. They may contain information about members of the congregation, such as age, date of baptism, christening, or birth; marriage information and maiden names; and death date. For general information about Oklahoma denominations, view the Oklahoma Church Records Wiki page.

LDS Ward and Branch Records

  • Bartlesville



Land and property records can place an ancestor in a particular location, provide economic information, and reveal family relationships. Land records include: deeds, abstracts and indexes, mortgages, leases, grants and land patents.

See Oklahoma Land and Property for additional information about early Oklahoma land grants. After land was transferred to private ownership, subsequent transactions were usually recorded at the county courthouse, where records are currently housed.

Online Land Records

For more information see Oklahoma Land and Property

Local Histories

Local histories are available for Washington County, Oklahoma Genealogy. County and town histories may include biographies, church, school and government history, and military information. For more information about local histories, see the wiki page section Oklahoma Local Histories.

Muskogee and Northeastern Oklahoma: including the counties of Muskogee, McIntosh, Wagoner, Cherokee, Sequoyah, Adair, Delaware, Mayes, Rogers, Washington, Nowata, Craig, and Ottawa. Chicago: S.J. Clarke Publishing Co., 1922




Revolutionary War
Civil War


Oklahoma Newspapers Online

Oklahoma Newspaper Catalogs

Additional newspapers abstracts can sometimes be found using search phrases such as Washington County, Oklahoma Genealogy newspapers in online catalogs like:


Online Records

School Records


Oklahoma tax records complement land records and can be used to supplement the years between censuses. There may be gaps of several years in the records.

Vital Records


Online Birth Records Indexes and Images


Online Marriage Records Indexes and Images


Online Death Records Indexes and Images


Online Divorce Records Indexes and Images

Societies and Libraries

Washington County Historical Society
801 N. Delaware Avenue
Dewey, Oklahoma 74029
Telephone: 918-534-0215

Bartlesville Genealogical Society
c/o Bartlesville Public Library
600 S. Johnstone Ave.
Bartlesville, OK 74003

Family History Centers

Family history centers provide one-on-one assistance and free access to premium genealogical websites. In addition, many centers have free how-to genealogy classes. See family history center for more information. Search the online FHC directory for a nearby family history center.



  1. Handybook for Genealogists: United States of America, 10th ed. (Draper, Utah: Everton Pub., 2002), Washington County, Oklahoma. Page 562 At various libraries (WorldCat); FHL Book 973 D27e 2002.
  2. The Handybook for Genealogists: United States of America,10th ed. (Draper, UT:Everton Publishers, 2002).
  3. https://en.wikipedia.org/wiki/Washington_County,_Oklahoma accessed 09/29/2016
  4. Wikipedia contributors, "Washington County, Oklahoma," in Wikipedia: the Free Encyclopedia, https://en.wikipedia.org/wiki/Washington_County,_Oklahoma, accessed 6 August 2016.