Baseball competitions at the 1979 Pan American Games in San Juan, Puerto Rico, were held on July 2–12.

[4] Cuba entered the competition as the two-time defending champions, having won the gold medal in 1971 and 1975.

They successfully defended their title, with the Dominican Republic finishing second.

The tournament consisted of a single round-robin group where all nine teams played each other once.

Medals were awarded to the top three teams in the group at the end of the tournament.