The mission of the Roper Center is to collect, preserve, and disseminate public opinion data; to serve as a resource to help improve the practice of survey research; and to broaden the understanding of public opinion through the use of survey data in the United States and around the world.

Who We Are

The Roper Center for Public Opinion Research is the largest archive of public opinion data in existence. The Center holds data dating back to the 1930s and from over 100 nations.

The Roper Center is a public opinion archive — it preserves the data from polls conducted by many leading survey organizations for the use of researchers, students, and journalists. Read more about the purpose of the Center.
Elmo Roper founded the Roper Center just after World War II. He and George Gallup played leading roles in its subsequent development. The survey organizations they established have continued to contribute their polls to the Center’s library, and scores of other survey organizations in the United States, and many foreign countries, have followed their example. Read more about the history of the Center.

Quick Access

Search US questions with iPOLLSEARCH iPOLL

Dataset is available using RoperExpressSEARCH DATASETS

Recent Posts

The Public and its Right to Know

Fifty years since the Freedom of Information Act was first passed, the country is still debating how much transparency in government is appropriate. While the public has widely supported greater openness for decades, some concerns remain. […]

2016 Mitofsky Award Winner James Stimson

The Roper Center Board of Directors is proud to announce that noted public opinion scholar, author, and mentor James Stimson is the recipient of the […]

Two Thumbs Down: 2016 Presidential Candidates’ Favorability

Are Donald Trump and Hillary Clinton the least-liked presidential candidates in recent history? There’s evidence they may be. Trump’s unfavorability ratings have been declining over the last few weeks, but the most recent Gallup poll still placed his unfavorables at 60%, with Clinton’s a lower but still dismal 54%. Other polls have found higher negatives still. Just how bad are these numbers? […]