Comoros competed at the 2004 Summer Olympics in Athens, Greece, from 13 to 29 August 2004.
Comorian 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).
- Note–Ranks given for track events are within the athlete's heat only
- Q = Qualified for the next round
- q = Qualified for the next round as a fastest loser or, in field events, by position without achieving the qualifying target
- NR = National record
- N/A = Round not applicable for the event
- Bye = Athlete not required to compete in round
||Did not advance