Ireland competed at the 1948 Summer Olympics in London, England. It was the first time that the country had competed in the Summer Olympics since 1932. A dispute between rival Irish Athletics governing bodies saw many Irish athletes barred from taking part in the Athletics competitions. 72 competitors, 68 men and 4 women, took part in 32 events in 9 sports.
Ireland made their only Olympic basketball appearance to date, losing all five of their games and finishing last of 23 teams.
Five fencers, four men and one woman, represented Ireland in 1948.
Ireland had nine male rowers participate in one out of seven rowing events in 1948.