The men's 800 metres at the 2024 World Athletics Indoor Championships took place on 1–3 March 2024.

Qualification: First 2 in each heat (Q) and the next 2 fastest (q) advance to the Semi−Final The heats were started at 12:16.

[1] Qualification: First 3 in each heat (Q) advance to the Final The heats were started on 2 March at 12:30.

[2] The final was started on 3 March at 21:10.

[3]