The men's 800 metres event at the 2019 Summer Universiade was held on 11, 12 and 13 July at the Stadio San Paolo in Naples.
Qualification: First 4 in each heat (Q) and next 4 fastest (q) qualified for the semifinals.
[1] Qualification: First 2 in each heat (Q) and next 2 fastest (q) qualified for the final.
[2] [3]