Jerry (1821 – 14 May 1851) was a British Thoroughbred racehorse and sire best known for winning the classic St Leger Stakes in 1824. In a racing career which lasted from 1824 until 1827 he ran ten times and won five races. Unraced as a two-year-old, he was beaten on his first appearance in 1824 but then won the York St Leger and the XYZ Stakes at Newcastle before defeating twenty-two opponents in the St Leger at Doncaster. Jerry missed the entire 1825 season and showed little form in 1826, but won twice as a six-year-old in 1827. He was retired to stud, where he proved to be a successful sire of winners.

Jerry was a black horse bred in Yorkshire by his owner Richard Gascoigne. According to a description written in 1827, he stood 15.3 hands high and possessed "immense muscular power".

Jerry was one of two classic winners sired by the 1813 Epsom Derby winner Smolensko, the other being the Oaks winner Gulnare. Jerry was the third of fifteen foals produced by Gascoigne's mare Louisa between 1819 and 1837. Her dam Thomasina was a half-sister of the classic winners Symmetry (St Leger) and Theophania (Oaks).

Gascoigne sent his colt into training with James Croft at East Wilton near Middleham.

Jerry did not run as a two-year-old and began his racing career on 22 April 1824 at Catterick Bridge Racecourse in Yorkshire. He started at odds of 2/1 for the two mile race and finished second of the five runners behind Lord Sligo's colt Canteen. Jerry next appeared at York Racecourse on 24 May when he contested a "St Leger Stakes". The success of the St Leger at Doncaster had led other major courses, including York and Newmarket to use the name for their own long distance races for three-year-olds; the original race was renamed the "Great St Leger" for several years to distinguish itself from the imitators. Ridden by H. Edwards, he mas made the 5/2 second favourite and recorded his first win by beating Major Cunninghame's Outcry colt and five others, including the favourite Streatham.

In July, Jerry was sent north to compete at Newcastle Racecourse in Northumberland and won the two mile XYZ Stakes from a single opponent.

Nineteen colts and four fillies were attracted to Doncaster Racecourse on 20 September for the forty-ninth running of the Great St Leger. Jerry was ridden by Ben Smith and started the 9/1 third favourite behind Streatham and Brutandorf. Jerry won the race from Canteen. Shortly after his win in the St Leger, Jerry was sold for 2,000 guineas to Lord Kelburne.

Jerry missed the entire 1825 season as a result of health problems and failed to reproduce his best form as a five-year-old. He did not reappear in public until 16 May 1826 when he finished unplaced behind the mare Fleur-de-Lis in the two mile York Gold Cup. Two years after his St Leger win, Jerry returned to Doncaster in autumn and produced a "very bad" performance to be last of the five runners behind Fleur-de-Lis in the Doncaster Cup. Jerry's third and final run of the year came on 4 October, when he finished second to Lord Kennedy's horse Bedlamite in the Richmond Gold Cup.