This is a tentative timeline of major events leading up to, during, and after the 2024 United States presidential election. This will be the first presidential election to be run with population data from the 2020 census. In addition to the dates mandated by the relevant federal laws such as those in the U.S. Constitution and the Electoral Count Act, several milestones have consistently been observed since the adoption of the conclusions of the 1971 McGovern–Fraser Commission.
2020
November 7: Joe Biden is declared the winner of the 2020 presidential election by a consensus of major news outlets projecting the results, defeating incumbent President Donald Trump. December 18: The U.S. Supreme Court delivers its per curiam decision in Trump v. New York regarding the 2020 United States census, effectively allowing Trump's July 2020 presidential memorandum to stand, which ordered the Department of Commerce exclude the estimated counts of illegal immigrants. The per curiam decision vacated the U.S. District Court's previous ruling on the basis that the case was premature due to lack of standing and ripeness. Justice Stephen Breyer files a dissent, which was joined by Justices Sonia Sotomayor and Elena Kagan, arguing that the Court should have considered the case. December 31: The U.S. Census Bureau misses the deadline to deliver the 2020 census results and the new apportionment counts to outgoing President Donald Trump.
2021
January 6: United States Capitol attack: Trump supporters attack and storm the Capitol building in an attempt to stop the counting of the electoral votes. January 13: President Trump is impeached for a second time in relation to the events that took place the prior week. January 20: Joe Biden is inaugurated as the 46th president of the United States, along with Kamala Harris as the 49th vice president. February 13: Trump is acquitted by the Senate, maintaining his eligibility for a non-consecutive re-election bid. April 26: The apportionment figures of the 2020 census are released, determining the distribution of electoral votes for the 2024 and 2028 elections. June 26: Trump begins a series of campaign-style rallies. November 20: President Biden and some of his aides inform some allies that he plans to run again in 2024.