Bachelor's Double (22 April 1906 – 3 February 1931) was an Irish-bred Thoroughbred racehorse that raced in Ireland and Britain and was a successful sire in the early 20th century.

Bachelor's Double was foaled on 22 April 1906[2] at Oatlands Stud, the estate of his breeder Albert Lowry near Navan, County Meath, Ireland.

Lady Black produced six stakes winners, including the colts Bachelor's Charm and Melesigenes, who ran with success in India.

In his first career start on 24 August, he won the £900 Leopardstown Grand Prize in a "good race", beating the Steward's Cup winner Golden Rod[3] by a margin of two lengths.

[6] On 29 June, Bachelor's Double won the Irish Derby at the Curragh, beating The Phoenician and Electric Boy by a length and a half.

Going into the St. Leger as an undefeated racehorse, the press considered him to be a possible contender to Bayardo and Minoru, noting that while he was a stayer that had beaten stakes winners in Ireland,[8] "his victories [may] have been easily gained and amount to little.

Quickly losing ground at the Red House he finished in last place, Bayardo winning by a length and a half over Lord Carnarvon's colt Valens.

[13] The next day Lowry sold Bachelor's Double to rubber manufacturing magnate William Wellington Bailey for 6,000 guineas.

At Kempton Park, Bachelor's Double started in the 25th running of the "Jubilee" Handicap, drawing the number one position, deemed the "worst", on the outside of the course's track.