General Information: 503-823-4000
1221 SW 4th Avenue, Room 110, Portland, OR 97204
New businesses are required to register with the City of Portland and Multnomah County (PDF form or online). Existing businesses changing their tax entity, and sole proprietors/single-member LLCs reopening their business should re-register and provide their business tax account number.
Strategies to determine if you need to register your business
No. Portland and Multnomah County have separate responsibilities and separate taxes
Register with Portland and/or Multnomah County online
Register with Portland and/or Multnomah County
Business registration, business searches, etc., with the State of Oregon