The Washington State Noxious Weed Control Board is tasked with maintaining and updating the official list of noxious weeds that landowners may be required to control. 

• To learn more about the three different classes of noxious weed, click here. 
• To learn about noxious weed laws in Washington State, check out our laws page. 
• For information on the weed listing process, click here. 

You may not be required to control every Class B or Class C noxious weed in your county. Be sure to check with your County Noxious Weed Control Board for the list of weeds that you are required to control or eradicate. We encourage control of all invasive species, regardless of legal requirement. To learn why, read our booklet on noxious weeds in WA. 

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Standard Letter-Sized Version

This list can be printed on standard, 8.5" x 11", letter-sized paper. Click the links below to download the PDF file.

2025 State Weed list alphabetized by common name (PDF)

2025 State Weed list alphabetized by scientific name (PDF)

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Please note: files will open in new window or new tab, depending on your browser. We also have hard copies of the noxious weed list available! Request copies of the noxious weed list and other publications on our survey form here. Please contact us for more information and if you have any questions.