The latest Gallup poll shows a record high of 50 percent of Americans in favor of legalizing marijuana use. This follows a consistent upward trend, picking up speed in 2006 when 36 percent of Americans favored marijuana legalization.
A majority of Americans from the East, Midwest, and West, men, liberals, moderates, and independents, Democrats, and individuals ages 18-49 support legalizing the use of marijuana. In contrast, majorities are not reached among women, Republicans, conservatives, individuals over 50, and those from the South.
Gallup Poll Survey Methods
Results for this Gallup poll are based on telephone interviews conducted Oct. 6-9, 2011, with a random sample of 1,005 adults, aged 18 and older, living in all 50 U.S. states and the District of Columbia.
For results based on the total sample of national adults, one can say with 95 percent confidence that the maximum margin of sampling error is ±4 percentage points.
Interviews are conducted with respondents on landline telephones and cellular phones, with interviews conducted in Spanish for respondents who are primarily Spanish-speaking. Each sample includes a minimum quota of 400 cell phone respondents and 600 landline respondents per 1,000 national adults, with additional minimum quotas among landline respondents by region. Landline telephone numbers are chosen at random among listed telephone numbers. Cell phone numbers are selected using random-digit-dial methods. Landline respondents are chosen at random within each household on the basis of which member had the most recent birthday.
Samples are weighted by gender, age, race, Hispanic ethnicity, education, region, adults in the household, and phone status (cell phone only/landline only/both, cell phone mostly, and having an unlisted landline number). Demographic weighting targets are based on the March 2010 Current Population Survey figures for the aged 18 and older non-institutionalized population living in U.S. telephone households. All reported margins of sampling error include the computed design effects for weighting and sample design.
In addition to sampling error, question wording and practical difficulties in conducting surveys can introduce error or bias into the findings of public opinion polls.
For more details on Gallup's polling methodology, visit www.gallup.com.