This guide lists the major front runners for the Democratic, Republican, Libertarian and Green Parties. However, the list of those running for president is much more substantial. If you need a complete list in its entirety, visit the Federal Election Commission. The New York Times posted a timeline of major-party candidates who have dropped out of the race.
If you'd like to check out the bios, voting record, speeches, positions and more for a particular candidate go to Project Vote Smart and search for your desired candidate by name or zip code.
Having trouble deciding which candidate matches up with your opinions and stances on the issues? Try one of these quizzes...which can get quite detailed...and then see who might be the candidate for you. Coverage includes state and national candidates.
With the coming elections you may want to see the political platforms of the current nominees. ProCon.org compiles their positions and you can see them side by side.
The Washington Post is maintaining and updating this side-by-side comparison graphic highlighting Donald Trump and Joe Biden's respective positions on several main issues.