The men's decathlon competition of the athletics events at the 2023 Pan American Games took place on October 30 and 31 at the Julio Martínez National Stadium of Santiago, Chile.

[1] Prior to this competition, the existing world and Pan American Games records were as follows: All times shown are in seconds.

Wind:Heat 1: -0.7 m/s, Heat 2: -1.6 m/s Wind:Heat 1: 0.0 m/s, Heat 2: +0.3 m/s