Sir William Benjamin Gentle (8 September 1865 – 2 September 1948) was an English police officer known for his work in fighting racecourse crime and was jointly responsible for promoting greyhound racing in the United Kingdom.

[2] Gentle was born in Ashwell, Hertfordshire in 1885 and was educated at Merchant Taylor's School.

[2] He was Colonel of the Sussex Yeomanry Cadet Corps and was staff assistant commissioner of the St. John Ambulance Brigade.

[4] Gentle was chairman and director of the Belle Vue Zoo in Manchester that featured circus animals.

[2][6] Lady Cory resigned from the RSPCA council in June 1931 in protest of Gentle's membership.