Washington County, Oregon Genealogy

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

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

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

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