| Location: | Longchamp Racecourse |
| Previous: | 1979 |
| Next: | 1981 |
The 1980 Prix de l'Arc de Triomphe was a horse race held at Longchamp on Sunday 5 October 1980. It was the 59th running of the Prix de l'Arc de Triomphe.
The winner was Detroit, a three-year-old filly trained in France by Oliver Douieb. The winning jockey was Pat Eddery who was winning the race for the first time. The filly won by half a length and a short head from Argument and Ela-Mana-Mou.
The winning time of 2m 28.0s was a new record for the race.[1]
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| Pos. | Marg. | Horse | Age | Jockey | Trainer (Country) | |
|---|---|---|---|---|---|---|
| 1 | Detroit | 3 | Pat Eddery | Olivier Douieb (FR) | ||
| 2 | ½ | Argument | 3 | Jean-Claude Desaint | John Cunnington Jr. (FR) | |
| 3 | shd | Ela-Mana-Mou | 4 | Willie Carson | Dick Hern (GB) | |
| 4 | nk | Three Troikas | 4 | Freddy Head | Criquette Head (FR) | |
| 5 | 1 | Nebos | 4 | Lutz Mäder | Hein Bollow (GER) | |
| 6 | 2 | Nicholas Bill | 5 | Philip Waldron | Henry Candy (GB) | |
| 7 | snk | Dunette | 3 | Georges Doleuze | E. Chevalier du Fau (FR) | |
| 8 | ½ | Le Marmot | 4 | Philippe Paquet | François Boutin (FR) | |
| 9 | ¾ | Ruscelli | 3 | Maurice Philipperon | Freddie Palmer (FR) | |
| 10 | 2 | Satilla | 3 | A Perrotta | J Gobel (FR) | |
| 11 | 3 | Little Bonny | 3 | Christy Roche | Kevin Prendergast (IRE) | |
| 12 | hd | Moulouki | 3 | Alfred Gibert | Mitri Saliba (FR) | |
| 13 | ½ | Niniski | 4 | Joe Mercer | Dick Hern (GB) | |
| 14 | shd | Providential | 3 | Alain Lequeux | Olivier Douieb (FR) | |
| 15 | ½ | Mrs Penny | 3 | John Matthias | Ian Balding (GB) | |
| 16 | shd | Policeman | 3 | Gerard Dubroeucq | Charlie Milbank (FR) | |
| 17 | 5 | Noble Saint | 4 | Greville Starkey | Robert Armstrong (GB) | |
| 18 | 4 | Glenorum | 3 | Lester Piggott | David Smaga (FR) | |
| 19 | Lindoro | 4 | M Thomas | Dick Hern (GB) | ||
| 20 | Iades | 5 | J Heloury | (FR) |
Further details of the winner, Detroit.