Wikipedia - Opinion Polling for the United States Presidential Election, 2008
- Hyperlinked encyclopedia article about poll results, including links to the results of each one.
- http://en.wikipedia.org/wiki/Opinion_polling_for_the_United_States_presidential_election,_2008

Rasmussen Reports - Politics
- Reports and polls on U.S. politics, focusing on the 2008 presidential campaign.
- http://rasmussenreports.com/public_content/politics/

Gallup Poll - Election 2008
- Presidential polling questions, results, reports and comparisons over the campaign cycle.
- http://www.galluppoll.com/content/default.aspx?ci=17785

PollingReport.com - Election 2008
- Collection of polls from various sources about the potential candidates for the US presidential election.
- http://www.pollingreport.com/2008.htm

Des Moines Register - The Iowa Poll
- Collection of poll results leading up to the Iowa Caucus, covering candidates and issues.
- http://desmoinesregister.com/apps/pbcs.dll/section?category=iowapoll07