States' deadline dates: registration, early voting, absentee ballots + links to official election sites - National Association of Manufacturers
State Voter Registration and Absentee Information - Project Vote Smart
Each state and territory - U.S. Election Assistance Commission
Voter registration deadlines and online resources - Pew Center's electiononline.org
Check Voter Registration- Black Box Voting
Choose one or more criteria in a single state or one criterion in one or more states - Vote411.org
States' registration and polling place information - VotersUnite.org
Information for Uniformed Service Members, their Families and Citizens Living Outside of the U.S. - Federal Voting Assistance Program