Angus Reid Poll: Majority of Americans and Canadians Support Marijuana Legalization | Just Say Now Good News: " The survey found that 57 percent of Canadians support the legalization of marijuana, while only 39 percent oppose the idea. By comparison, 54 percent Americans support marijuana legalization, while 42 percent want it to remain illegal. In both counties the generational divide on the issue indicates support for legalization is likely to grow. "