Ireland competed at the 1980 Summer Olympics in Moscow, USSR. 47 competitors, 44 men and 3 women, took part in 38 events in 11 sports. In partial support of the American-led boycott of the 1980 Summer Olympics, Ireland competed under the Olympic Flag instead of its national flag.
David Wilkins and James Wilkinson — Sailing, Flying Dutchman classHugh Russell — Boxing, Men's FlyweightIn Ireland's second appearance in archery competition at the Olympics, the nation was represented by two men and one woman. The men included Ireland's only veteran from 1976, James Conroy. It was Hazel Greene, however, who posted the nation's best results.
Women's Individual Competition:
Hazel Greene — 2229 points (→ 19th place)Men's Individual Competition:
William Swords — 2212 points (→ 31st place)James Conroy — 2058 points (→ 37th place)Men's 1,500 metres
Ray FlynnHeat — 3:42.0 (→ did not advance)Men's 5,000 metres
Eamonn CoghlanHeat — 13:45.4Semi Final — 13:28.8Final — 13:22.8 (→ 4th place)John TreacyHeat — 13:44.8Semi Final — 13:40.3Final — 13:23.7 (→ 7th place)Mick O'SheaHeat — 14:03.0 (→ did not advance)Men's 10,000 metres
John TreacyHeat — did not finish (→ did not advance)Men's Marathon
Dick HooperFinal — 2:23:53 (→ 38th place)Pat HooperFinal — 2:30:28 (→ 42nd place)John TreacyFinal — did not start (→ no ranking)Men's Hammer Throw
Seán EganQualification — 63.94 m (→ did not advance, 16th place)Men's Light Flyweight (– 48 kg)
Gerard HawkinsFirst Round — ByeSecond Round — Lost to Ismail Mustafov (Bulgaria) on points (0-5)Men's Flyweight (– 51 kg)
Hugh Russell → Bronze MedalFirst Round — Defeated Samir Khiniab (Iraq) on points (5-0)Second Round — Defeated Emmanuel Mlundwa (Tanzania) on points (5-0)Quarter Finals — Defeated Yo Ryon-Sik (North Korea) on points (3-2)Semi Finals — Lost to Petar Lesov (Bulgaria) on points (0-5)Men's Bantamweight (– 54 kg)
Philip SutcliffeFirst Round — ByeSecond Round — Lost to Daniel Zaragoza (Mexico) on points (0-5)Men's Featherweight (– 57 kg)
Barry McGuiganFirst Round — ByeSecond Round — Defeated Issack Mabushi (Tanzania) after referee stopped contest in third roundThird Round — Lost to Winfred Kabunda (Zambia) on points (1-4)Men's Lightweight (– 60 kg)
Sean DoyleFirst Round — Defeated Nelson René Trujillo (Venezuela) after referee stopped contest in second roundSecond Round — Lost to Florian Livadaru (Romania) after referee stopped contest in first roundMen's Light-Welterweight (– 63,5 kg)
Martin BrertonFirst Round — Lost to José Aguilar (Cuba) after referee stopped contest in first roundThree cyclists represented Ireland in 1980.
Individual road raceBilly KerrStephen RocheAnthony LallyThree male pentathletes represented Ireland in 1980.
Individual Competition:
Jerome Hartigan — 4.557 pts 39th placeSackville Currie — 4.377 42nd placeMark Hartigan — 4.361 pts, 43rd placeTeam Competition:
Hartigan, Currie, and Hartigan — 13.295pts 12th placeMen's Coxless Pairs
Pat Gannon and Willie RyanHeat 3 — 3rd (Q)Semi-Final — 5th (-)B-Final — 1stOverall — 7thDavid Wilkins and James Wilkinson — Flying Dutchman classMen's 100m Freestyle
David CumminsHeats — DNS (→ no ranking)Men's 200m Freestyle
David CumminsHeats — DNS (→ no ranking)Kevin WilliamsonHeats — 1.57,37 (→ did not advance)Women's 100 m Breaststroke
Catherine BohanHeats — 1:16.84 (→ did not advance)Women's 400 m Individual Medley
Catherine BohanHeats — 5:21.82 (→ did not advance) 
