Swimming at the 2023 Pan American Games – Men's 800 metre freestyle

The men's 800 metre freestyle competition of the swimming events at the 2023 Pan American Games were held on October 23, 2023, at the Aquatic Center in Santiago, Chile.

Records
Prior to this competition, the existing world and Pan American Games records were as follows: The following record was established during the competition:

Final
The final round was held on October 23 and divided into three different races.