National surveys concerning public opinion of the ACLU have been done by Harris Poll in 2005 and 2006. The 2006 poll was conducted online by Harris Interactive between Nov. 13-20 among 2,429 adults (aged 18 and over). The survey asked participants to "Please indicate your familiarity with the following organizations." Those who were familiar with an organization were then asked "How much do you trust these organizations?" The poll results are provided below.
Figures for age, sex, race, education, region, and household income were weighted by Harris to bring them into line with their actual proportions in the population. Propensity score weighting was also used to adjust for respondents’ propensity to be online. The surveys were not based on a probability sample, and therefore no margin of error can be calculated.