The Colonel (1825-1847) was a chestnut thoroughbred racehorse who was bred at the Wyvill Constable Burton stud in Yorkshire. He had a broad white blaze, stood at 15.2 hands high, and was owned by Edward Petre (1794-1848), a politician and prominent figure in racing. The Colonel is best known for running a dead heat in the Derby and winning the St Leger Stakes in 1828. In a racing career which lasted from 1827 until 1831, he ran fifteen times and won ten races at distances ranging from six furlongs to three miles. Other notable successes came in the Champagne Stakes, the Epsom Craven Stakes (twice), the Great Park Stakes at Ascot and the Northampton Gold Cup. He also placed in both the Ascot Gold Cup and Goodwood Cup.

At the end of the 1828 season, The Colonel was bought for £4,000 by King George IV, who is said to have decided to buy the horse after seeing a painting by John Frederick Herring Snr. After the death of the King in June 1830, The Colonel became the property of his brother, King William IV, and later stood at stud at Hampton Court. In Thomas Henry Taunton's Portraits of celebrated racehorses of the past and present centuries (1887) he is described as 'a small short horse, with very fine speed, high and fighting in his action', and 'the beau-ideal of an English thoroughbred'.