Horse chestnut may refer to:

• Aesculus hippocastanum, a species of large deciduous tree native to Europe and planted around the world as an ornamental tree
• Aesculus glabra, a species of medium-sized deciduous tree also called Ohio buckeye native to the continental US and Canada
• Aesculus californica, California horse-chestnut or California buckeye, a species of large deciduous shrub or small tree
  • Species of the genus Aesculus
• Horse Chestnut (horse), a South African Thoroughbred racehorse
• Chestnut (coat), a common coat color in horses
• Chestnut (horse anatomy), the callous on the leg of a horse

See also[edit]

• Horse-chestnut leaf miner, a moth of the lepidopteran family Gracillariidae
• Chestnut (disambiguation)