Washington County, Oregon Genealogy

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History and Tidbits
Washington county was renamed from Twality County 3 September 1849. Named for George Washington, the first president of the United States. Parts taken for Columbia and Multnomah.

The county seat is Hillsboro.

County Records Inventory listing the records held at the Washington County Court House as of October 2005.

Cities
Banks | Beaverton | Cornelius | Durham | Forest Grove | Gaston | Hillsboro | King City | Lake Oswego | Portland | North Plains | Sherwood | Tigard | Tualatin | Wilsonville

Unincorporated Communities
Aloha | Bacona | Balm Grove | Bethany | Blooming | Bonita | Bonny Slope | Bradley Corner | Buckheaven | Bull Mountain | Buxton | Carnation | Cedar Hills | Cedar Mill | Centerville | Chehalem | Cherry Grove | Copper Mountain | Dilley | Dixie | Elmonica | Farmington | Gales Creek | Garden Home-Whitford | Glencoe | Glenwood | Hayward | Hazeldale | Helvetia | Hillside | Huber | Kansas City | Kinton | Laurel | Laurelwood | Manning | Marlene Village | Metzger | Middleton | Midway | Mountaindale | Mulloy | Norwood | Oak Hills | Orenco | Patton | Progress | Raleigh Hills | Reedville | Rivergrove | Rockcreek | Roy | Scholls | Six Corners | Somerset West | Tanasbourne | Timber | Tobias | Verboort | Watts | West Haven-Sylvan | West Slope | West Union | Wilkesboro | Witch Hazel

Neighboring Counties
Clackamas | Clatsop | Columbia | Multnomah | Tillamook | Yamhill

Resources
Census


 * 1845 Territorial Transcription and Index (under name of Tuality, Twalatain and Twality County)
 * 1849 Territorial Transcription and Index (under name of Twality County)

Genealogy Websites
The Washington County GenWeb Project, part of The ORGenWeb Project, a state project affiliated with The USGenWeb Project.