Assessment and Taxation Office Area: Public Services Building, Suite 240, 155 N First Ave, Hillsboro, OR 97124; 

Circuit Court Offices (All offices): 150 N First Ave, Hillsboro, OR 97124; 

Commissioners Office​: Public Services Building, 155 N First Ave, Suite 300, Hillsboro, OR 97124;

Contracted Off-site Microfilm/Records Storage: No public access. Request records from the relevant office (e.g., recording, assessment, etc.); 

County Fair Office: 873 NE 34th Ave, Hillsboro, OR 97124; 

County Historical Records Vault: No public access. Request records from the relevant office (e.g., recording, assessment, etc.); 

County Imaging Center: No public access. Request records from the relevant office (e.g., recording, assessment, etc.); 

County Records Center: No public access. Request records from the relevant office (e.g., recording, assessment, etc.); 

Current Planning Section Office: Public Services Building, 155 N First Ave, Suite 350, Hillsboro, OR 97124; 

Developmental Disabilities Program Management Supervisor's Office: Public Services Building, 155 N First Ave, Suite 250, Hillsboro, OR 97124; 

Five Oaks Museum​: (located at Portland Community College Rock Creek Campus-by appointment only) 17677 NW Springville Rd, Portland, OR 97229.

Health and Human Services Department Office: Public Services Building, 155 N First Ave, Suite 250, Hillsboro, OR 97124; 

Justice Services Building (All circuit court offices and storage areas): 150 N First Ave, Hillsboro, OR 97124; 

Northwest Regional Education Service District ​Office, Vault: 5825 NE Ray Circle, Hillsboro OR 97124;

Oregon Historical Society​: 1200 SW Park Ave, Portland, OR 97205; 

Oregon State Archives: 800 Summer St NE, Salem, OR 97310; 

Public Research Area (Assessment and Taxation Department): Public Services Building, 155 N First Ave, Suite 130, Hillsboro, OR 97124; 

Public Services Building (All offices and storage areas): 155 N First Ave, Hillsboro, OR 97124; Recording Division Office: Public Services Building, 155 N First Ave, Suite 130, Hillsboro, OR 97124; Survey Section Vault: No public access. Request records from the county Survey Section office in Public Services Building, Suite 350; 

Walnut Street Center Building, Second Floor Circuit Court Archives: No public access. Request records from the circuit court office; 

Walnut Street Center Building, Survey Section Offices: 1400 SW Walnut St, Hillsboro, OR 97123;

Washington County Courthouse (All offices and storage areas): 150 N First Ave, Hillsboro, OR 97124; 

Washington County Records Inventory >