Swimming at the 2020 European Aquatics Championships – Men's 800 metre freestyle

The Men's 800 metre freestyle competition of the 2020 European Aquatics Championships was held on 21 and 22 May 2021.

Records
Before the competition, the existing world, European and championship records were as follows.

Heats
The heats were started on 21 May at 11:28.

Final
The final was held on 22 May 2021 at 18:00.