Swimming at the 2019 Pan American Games – Men's 800 metre freestyle

The men's 800 metre freestyle competition of the swimming events at the 2019 Pan American Games was held on August 8, 2019 at the Villa Deportiva Nacional Videna cluster.

Records
Prior to this competition, the existing World Record was as follows: As there was no existing Pan American Games record in the event, the following record was established during the competition:

Final
The final round was held on August 8.