1986 FIFA World Cup Group A

Group A was one of four groups of national teams competing at the 1986 FIFA World Cup. The group's first round of matches began on May 31 and its last matches were played on June 10. Most matches were played at the Estadio Olímpico Universitario in Mexico City or at the Estadio Cuauhtémoc in Puebla. Eventual champions Argentina topped the group, joined in the second round by 1982 champions Italy as well as Bulgaria. South Korea were making their first appearance in the tournament since 1954.