Presidential Rankings

This is intended to be a collection of public opinion polls, surveys of scholars, and other resources which provide rankings of U.S. presidents.

Presidents and History

This is a collection of surveys, beginning with a 1998 ABC News poll, provided by PollingReport.com.

Gallup Survey

2010 results, with more description and analysis than the above.

Historians Survey of Presidential Leadership

C-SPAN survey in which 65  presidential historians rate U.S. presidents on ten "attributes of leadership."

Historical Rankings of United States Presidents

This very useful article from Wikipedia is more detailed than the above PollingReport.com collection, but is unsigned and not a stable resource.