| Class: | Listed |
| Horse Race: | Prix Isonomy |
| Location: | Deauville-La Touques Racecourse, Deauville, France |
| Race Type: | Flat / Thoroughbred |
| Website: | france-galop.com |
| Distance: | 1,600 metres (1 mile) |
| Surface: | Turf |
| Track: | Right-handed |
| Qualification: | Two-year-olds excluding Listed winners |
| Weight: | 56 kg Allowances 1½ kg for fillies Penalties 2 kg if Group placed |
| Purse: | €55,000 (2012) 1st: €27,500 |
|}The Prix Isonomy is a Listed flat horse race in France open to two-year-old thoroughbreds. It is run at Deauville over a distance of 1,600 metres (about 1 mile), and it is scheduled to take place each year in October.
The event is named after Isonomy, a successful racehorse in the late 19th century. It was formerly held at Le Tremblay with a distance of 1,100 metres. It used to be staged in early September.
The race was transferred to Évry in the 1970s. For a period it took place in late October or early November. It was contested over 2,000 metres for several years, and shortened to 1,800 metres in 1990.
The Prix Isonomy was run at Saint-Cloud over 1,600 metres in 1996. It was run at Longchamp over 1,800 metres in 1997 and 1998.
The race was restored to 1,600 metres in 1999. For brief periods it was held at Maisons-Laffitte (1999–2000), Saint-Cloud (2001–02) and Fontainebleau (2003–04). It started a longer spell at Saint-Cloud in 2005, and was switched to Chantilly in 2012.[1] Since 2015 the race has been run at Deauville in late October.
Leading jockey since 1978 (5 wins):
----Leading trainer since 1978 (4 wins):
----Leading owner:
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| Year | Winner | Jockey | Trainer | Owner | Time | ||||
|---|---|---|---|---|---|---|---|---|---|
| 1978 | width=135px | Son of Love | width=152px | Alain Lequeux | width=159px | Robert Collet | width=159px | Alexis Rolland | 2:12.40 |
| 1979 | Jazz Band | Alain Lequeux | David Smaga | Mrs Gérard Aoudai | 2:17.20 | ||||
| 1980 | Daumont | Yves Saint-Martin | Joseph Audon | Giancarlo Gorrini | 2:09.50 | ||||
| 1981 | Flayosc | Antoine Perrotta | Gérard Philippeau | André Chollou | |||||
| 1982 | Ask the Wind | Cash Asmussen | François Boutin | Diana Firestone | 2:18.80 | ||||
| 1983 | Arneda | Freddy Head | David Smaga | Xavier Beau | 2:13.40 | ||||
| 1984 | Premier Role | Maurice Philipperon | John Cunnington Jr. | Paul de Moussac | 2:19.00 | ||||
| 1985 | Juba Dollar | Cash Asmussen | François Boutin | Stavros Niarchos | 2:05.90 | ||||
| 1986 | Avaleur | Alain Lequeux | David Smaga | Ecurie Seutet | 2:16.50 | ||||
| 1987 | Waki River | Alain Lequeux | Bernard Sécly | Jacki Clérico | |||||
| 1988 | Plein d'Esprit | Gérald Mossé | Élie Lellouche | Fernand Krief | 2:11.96 | ||||
| 1989 | Noble Ballerina | Éric Legrix | Dominique Sépulchre | Sir Gordon White | 2:05.18 | ||||
| 1990 | Subotica | Thierry Jarnet | André Fabre | Ecurie Demgalop | 2:01.20 | ||||
| 1991 | Mon Domino | Thierry Jarnet | Robert Collet | Henri Chalhoub | |||||
| 1992 | Sin Kiang | Thierry Jarnet | André Fabre | Y. Seydoux de Clausonne | 2:07.56 | ||||
| 1993 | Red Rubin | Thierry Gillet | Tony Clout | Serge Plot | 2:04.67 | ||||
| 1994 | Peckinpah's Soul | Pascal Marion | David Smaga | Ecurie Leader | 2:06.66 | ||||
| 1995 | Supreme Commander | Thierry Jarnet | André Fabre | Wafic Saïd | 2:01.44 | ||||
| 1996 | Film Noir | Olivier Doleuze | Criquette Head | Wertheimer et Frère | 1:45.00 | ||||
| 1997 | Quel Senor | Dominique Boeuf | François Doumen | John Martin | 2:00.70 | ||||
| 1998 | Montjeu | Cash Asmussen | John Hammond | Tsega Ltd | 2:01.70 | ||||
| 1999 | Loyal Tartare | Davy Bonilla | Élie Lellouche | Olivier Meyer | 1:42.70 | ||||
| 2000 | Domedriver | Cash Asmussen | Pascal Bary | Niarchos Family | 1:45.70 | ||||
| 2001 | King Solomon | Christophe Soumillon | Paul Cole | Blenheim Partnership | 1:48.00 | ||||
| 2002 | Vallee Enchantee | Dominique Boeuf | Élie Lellouche | Ecurie Wildenstein | 1:56.30 | ||||
| 2003 | Millemix | Ronan Thomas | Criquette Head-Maarek | Alec Head | 1:49.00 | ||||
| 2004 | Relais d'Aumale | Stéphane Pasquier | Mario Hofer | Stall Equie Celli | 1:46.40 | ||||
| 2005 | Hello Sunday | Ronan Thomas | Criquette Head-Maarek | Jean-Pierre Ribes | 1:56.80 | ||||
| 2006 | Anabaa's Creation | Stéphane Pasquier | Alain de Royer-Dupré | William Preston | 1:48.30 | ||||
| 2007 | Vadsalina | Stéphane Pasquier | Alain de Royer-Dupré | HH Aga Khan IV | 1:50.40 | ||||
| 2008 | Entre Deux Eaux | Ioritz Mendizabal | Robert Collet | Jesus / Vidal | 1:49.20 | ||||
| 2009 | No Risk at All | Ioritz Mendizabal | Jean-Paul Gallorini | Sylvia Wildenstein | 1:54.00 | ||||
| 2010 | Whip and Win | Gregory Benoist | Robert Collet | Wingtans / Vidal Family | 1:54.50 | ||||
| 2011 | All Shamar | Andreas Suborics | Waldemar Hickst | Stall Pregel | 1:51.90 | ||||
| 2012 | Onedargent | Thierry Jarnet | Jean-Paul Gallorini | Guy Pariente | 1:44.44 | ||||
| 2013 | Under The Radar | Cristian Demuro | François Doumen | Haras D'Ecouves | 1:45.28 | ||||
| 2014 | Vedouma | Stéphane Pasquier | Alain de Royer-Dupré | HH Aga Khan IV | 1:43.36 | ||||
| 2015 | La Cressonniere | Christophe Soumillon | Jean-Claude Rouget | Caro / Augustin-Normand | 1:52.98 | ||||
| 2016 | Al Wukair | Gregory Benoist | André Fabre | Al Shaqab Racing | 1:41.97 | ||||
| 2017 | Wootton | Mickael Barzalona | Henri-Alex Pantall | Godolphin | 1:41.97 | ||||
| 2018 | Duke Of Hazzard | Christophe Soumillon | Paul Cole | Fitri Hay | 1:42.19 | ||||
| 2019 | Tammani | P C Boudot | William Haggas | Prince A A Faisal | 1:51.22 | ||||
| 2020 | Parchemin | Mickael Barzalona | André Fabre | Godolphin | 1:49.08 | ||||
| 2021 | Mister Saint Paul | Theo Bachelot | E & G Leenders | Bernd Raber | 1:47.67 | ||||
| 2022 | Rajapour | Cristian Demuro | Jean-Claude Rouget | HH Aga Khan IV | 1:49.53 |
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