Ireland at the 1980 Summer Olympics

In 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 Flynn

• Heat — 3:42.0 (→ did not advance)

Men's 5,000 metres

• Eamonn Coghlan

• Heat — 13:45.4
• Semi Final — 13:28.8
• Final — 13:22.8 (→ 4th place)

• John Treacy

• Heat — 13:44.8
• Semi Final — 13:40.3
• Final — 13:23.7 (→ 7th place)

• Mick O'Shea

• Heat — 14:03.0 (→ did not advance)

Men's 10,000 metres

• John Treacy

• Heat — did not finish (→ did not advance)

Men's Marathon

• Dick Hooper

• Final — 2:23:53 (→ 38th place)

• Pat Hooper

• Final — 2:30:28 (→ 42nd place)

• John Treacy

• Final — did not start (→ no ranking)

Men's Hammer Throw

• Seán Egan

• Qualification — 63.94 m (→ did not advance, 16th place)

Men's Light Flyweight (– 48 kg)

• Gerard Hawkins

• First Round — Bye
• Second Round — Lost to Ismail Mustafov (Bulgaria) on points (0-5)

Men's Flyweight (– 51 kg)

• Hugh Russell → Bronze Medal

• First 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 Sutcliffe

• First Round — Bye
• Second Round — Lost to Daniel Zaragoza (Mexico) on points (0-5)

Men's Featherweight (– 57 kg)

• Barry McGuigan

• First Round — Bye
• Second Round — Defeated Issack Mabushi (Tanzania) after referee stopped contest in third round
• Third Round — Lost to Winfred Kabunda (Zambia) on points (1-4)

Men's Lightweight (– 60 kg)

• Sean Doyle

• First Round — Defeated Nelson René Trujillo (Venezuela) after referee stopped contest in second round
• Second Round — Lost to Florian Livadaru (Romania) after referee stopped contest in first round

Men's Light-Welterweight (– 63,5 kg)

• Martin Brerton

• First Round — Lost to José Aguilar (Cuba) after referee stopped contest in first round

Three cyclists represented Ireland in 1980.

Individual road race

• Billy Kerr
• Stephen Roche
• Tony Lally

Three male pentathletes represented Ireland in 1980.

Individual Competition:

• Jerome Hartigan — 4.557 pts 39th place
• Sackville Currie — 4.377 42nd place
• Mark Hartigan — 4.361 pts, 43rd place

Team Competition:

• Hartigan, Currie, and Hartigan — 13.295pts 12th place

Men's Coxless Pairs

• Pat Gannon — 1st B Final (→ 7th)
• Willie Ryan — 1st B Final (→ 7th)

Men's Coxed Pairs

• Denis Rice — 5th B Final (→ 11th)
• Christy O'Brien — 5th B Final (→ 11th)
• Liam Williams — 5th B Final (→ 11th)

Men's Coxed Fours

• Iain Kennedy — 5th B Final (→ 11th)
• Pat McDonagh — 5th B Final (→ 11th)
• Ted Ryan — 5th B Final (→ 11th)
• Davey Gray — 5th B Final (→ 11th)
• Noel Graham — 5th B Final (→ 11th)

Women's Single Sculls

• Frances Cryan — 1st B Final (→ 7th)

• David Wilkins and James Wilkinson — Flying Dutchman class

Men's 100m Freestyle

• David Cummins

• Heats — DNS (→ no ranking)

Men's 200m Freestyle

• David Cummins

• Heats — DNS (→ no ranking)

• Kevin Williamson

• Heats — 1.57,37 (→ did not advance)

Women's 100 m Breaststroke

• Catherine Bohan

• Heats — 1:16.84 (→ did not advance)

Women's 400 m Individual Medley

• Catherine Bohan

• Heats — 5:21.82 (→ did not advance)