Thousand Guineas is the name of a number of different horse races:

• 1000 Guineas Stakes in Great Britain
• 1,000 Guineas Trial Stakes trial race for the 1000 Guineas Stakes in Great Britain
• Thousand Guineas Prelude and The Thousand Guineas in Australia
• Poule d'Essai des Pouliches also known as the "French 1,000 Guineas"
• Irish 1,000 Guineas
• American 1000 Guineas Stakes
• New Zealand 1000 Guineas
• German 1,000 Guineas
• Guineas (greyhounds), originally the 1,000 Guineas

This disambiguation page lists articles associated with the title Thousand Guineas.
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