These are better for broader concepts and trends (like how the number of Americans who believe in climate change has changed over time, how many Americans listen to podcasts), rather than their opinions on certain products or brands.
Focuses on US public opinion from 1935-present. From the Roper Center for Public Opinion Research and includes public opinion survey data from a variety of organizations.
A database of polls taken on a variety of subjects all over the world. Each record in the database consists of one poll question and the participants' responses. Includes survey data from many organizations including Harris Poll and YouGov.