Multnomah County is responsible for zoning in most unincorporated areas of the County. Unincorporated areas are those areas located outside of a city.
Some unincorporated areas are administered by neighboring cities and have city zoning. These areas are determined through Intergovernmental Agreements (IGAs) and are known as IGA areas.
For information regarding City zoning in the IGA areas please contact the responsible city.
The maps below indicate the areas that are subject to the city zoning through these IGAS.
Overview Map
Gresham IGA
Gresham IGA - 162nd
Multnomah County IGA
Portland IGA - Dunthorpe
Portland IGA - Pleasant Valley
Portland IGA - Southern Border
Portland IGA - West County
Portland IGA - West Hayden Island
Troutdale IGA - Sundial
Troutdale IGA - Troutdale
