Guatemala competed at the 2004 Summer Olympics in Athens, Greece, from 13 to 29 August 2004. This was the nation's eleventh appearance at the Summer Olympics, excluding three occasions after its national debut at the 1952 Summer Olympics in Helsinki.
Guatemalan athletes have so far achieved qualifying standards in the following athletics events (up to a maximum of 3 athletes in each event at the 'A' Standard, and 1 at the 'B' Standard).
Guatemala has qualified a badminton player in the men's singles.
Guatemala has qualified a single athlete in modern pentathlon.
Guatemalan swimmers earned qualifying standards in the following events (up to a maximum of 2 swimmers in each event at the A-standard time, and 1 at the B-standard time):