Attorney General Andrew Swan says Manitoba is the first jurisdiction in North America to take the action.
The change does not affect criminal code cases, but makes it much easier for the province to seize property from gang members and evict them from houses.
Until now, Crown prosecutors had to prove the gang was a criminal organization during each court case.
Swan first announced the plan to designate the Hells Angels as a criminal organization last May and the application was reviewed by an independent three-member panel.
Swan says the Hells Angels did not file any objections.
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