Census Bureau - Voting and Registration Data
Information on voting and registration by various demographic and socioeconomic characteristics for November congressional and presidential elections. Access to historical trends as well as estimates and projections of voting-age population.

Federal Election Commission - About Elections and Voting
A wealth of information on all aspects of U.S. Elections and Voting. Broad topic areas include recent election results, voter registration and turnout statistics, primary elections and caucuses, administrative structure of U.S. Elections and more.

Gallup Poll
Contains an archive of Gallup poll news releases, Gallup poll data, special reports, and information about the Gallup organization.

Pollingreport.com: Tracking Poll Trends
A nonpartisan resource on trends in American public opinion. Has section on politics and policy, and a whole section devoted to the 2004 elections.

IDEA: Voter Turnout
From the International Institute For Democracy and Electoral Assistance. It's a picture of elections and voting around the Globe.

Los Angeles Times Poll
One of many news organizations who do political polling.

Pew Research Center for the People and the Press
This independent opinion research group studies attitudes toward the press, politics, and public policy issues.