Age and health concerns about Joe Biden

Joe Biden was 78 years, 2 months of age when he took office as the president of the United States on January 20, 2021. At the time, he became both the oldest person to be inaugurated as U.S. president and the oldest sitting president in U.S. history. While Biden, a Democrat, campaigned for re-election in 2024, he suspended his campaign in July 2024 after being pressured to withdraw due to concerns about his age and mental acuity.

Before and during Biden's presidency, American voters and Biden's predecessor and successor as president, Donald Trump of the Republican Party, expressed concerns about Biden's health and fitness for office. These concerns led Dean Phillips, a member of the U.S. House of Representatives, to launch an unsuccessful Democratic primary challenge against Biden prior to the 2024 presidential election. In a February 2024 report by the U.S. Department of Justice, Robert Hur, a special counsel, opined that Biden's memory had "significant limitations"; the Biden administration dismissed the report as a "partisan hit job".

Concerns about Biden's age and health intensified following his faltering performance in the June 2024 presidential debate against Trump, leading many Democratic Party lawmakers to call for Biden to end his campaign. After initially stating that he would remain in the race, Biden ultimately withdrew on July 21, 2024; he immediately endorsed his vice president, Kamala Harris, to replace him as the party's presidential nominee. In the weeks and months following Biden's June 2024 debate against Trump, media outlets reported on efforts that had been made to manage and conceal Biden's age- and health-related limitations during his presidency. Harris went on to lose to Trump in the general election.

At the time his term as president ended on January 20, 2025, Biden was 82 years and 2 months old. He was diagnosed with prostate cancer in May 2025.