The Men's 800 metre freestyle competition of the 2024 European Aquatics Championships was held on 18 and 19 June 2024.

[1][2] Prior to the competition, the existing world, European and championship records were as follows.

The heats were started on 18 June at 10:35.Qualification Rules: The 8 fastest from the heats qualify to the final.

[3] The final was held on 19 June at 20:07.

[4]