The modern pentathlon at the 1984 Summer Olympics was represented by two events: "Individual competition" and "Team competition". As it was usual in Olympic modern pentathlon until 1992, a single competition was held to determine both the individual and the team (country) ranking. In particular, the sum of each competitor's individual score from the same country determined the "Team competition" event result. 
The competition consisted of 5 disciplines:
Four out of the five events took place at the Coto Equestrian Center in Coto de Caza, California, while the swimming portion was held at the William Woollett Jr. Aquatics Center in nearby Irvine, California.
Participating nations.
A total of 52 athletes from 18 nations competed at the Los Angeles Games:
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