County government
Washington County
Start with Washington County for property assessment, elections, county records, emergency management, and many services for an unincorporated address. If the address is inside a city or town, that local government may handle permits, land use, and city services.
- Population
- 611,708
- Local place pages
- 31
- Census GEOID
- 41067
Population: 2025 Census estimate. Use the exact address, not the mailing name alone, to confirm whether a city, county, state office, court, utility, or district handles the task.
Local front desk
Start with the task, then confirm the boundary.
Start with Washington County for property assessment, elections and county records, emergency management, and many services for an unincorporated address.
Do not rely on the mailing city alone. Use the exact address, parcel, notice, case, or account to confirm the city, county, court, utility, fire, school, or other district that handles the task.
-
Local work
Permits, zoning, code, and municipal services
For an unincorporated address, start with Washington County. An address inside a city or town may start with that local government instead.
-
Property
Assessment, exemptions, tax accounts, and bills
Use the parcel or tax account to choose the county assessor. The city in a mailing address may not be the county that holds the account.
-
Records
Elections, county records, and circuit courts
Washington County handles elections and many county records. For court work, use the case, filing, or notice to find the correct Oregon Judicial Department service.
-
Vehicles
Driver licenses, titles, registration, and DMV visits
DMV is a state service. Use the official office directory to confirm services, appointments, and current hours before traveling.
-
Land and water
Septic systems, wells, and water rights
For septic work, use the county or regional agent listed by DEQ. For water rights, use the Water Resources Department and its watermaster districts. A mailing name does not choose either office.
-
Household help
Food, medical, cash, and child-care benefits
Start with Benefits Oregon to apply for statewide help. The specific program, eligibility rules, and case notice control the final answer.
Communities
Places connected to Washington County
This list includes every Census city, town, or census-designated place intersecting the county. A multi-county place appears in each of its county branches.
Published county context
Stories & Notes connected inside Washington County
These notes have a recorded relationship to the county or to a place intersecting it. That connection does not by itself make the county the controlling authority for the subject.
In Multnomah County, court, vital, and land records use different doors
Multnomah County routes court files to Oregon's Judicial Department, land documents to County Recording, and recent birth or death certificates to county Vital Records.
Oregon DMV fees use the vehicle details
MPG, electric or OReGO status, registration term, plates, and county can all change the total.
A Washington County address does not settle every local income tax
Metro and TriMet questions turn on program boundaries, work location, tax year, and income.
For Clackamas County permits, the address and work type choose the office
Unincorporated properties use the county for all building-permit types, while responsibility inside cities can still vary by permit type.
Portland short-term rentals have separate tax and property checks
State lodging tax, local tax registration, and permission to use the address are separate questions.
In Washington County, recorded, court, and vital records split three ways
County Recording keeps recorded documents, Circuit Court runs its own record requests, and birth or death certificates shift from county to state by event date.
Portland is one city in three counties
Portland reaches into Multnomah, Washington, and Clackamas counties, so an address check can change the records office or local jurisdiction a resident needs.
Washington County Environmental Health handles septic applications and records
Apply and search through Environmental Health, and request an as-built through county public records. Keep the site evaluation, installation permit, and authorization notice separate.
Keep going
Spot an Oregon detail that needs a source check, clearer wording, or a working link?
Send feedback