Statewide opinion polling for the 2020 United States presidential election

This is a list of statewide public opinion polls that have been conducted relating to the 2020 United States presidential election. The persons named in the polls are declared candidates or have received media speculation about their possible candidacy.
If multiple versions of polls are provided, the version among likely voters is prioritized, then registered voters, then adults.
Polling aggregation in swing states.
The following graph depicts the difference between Joe Biden and Donald Trump in each swing state in the poll aggregators from March 2020 to the election, with the election results for comparison.