Tulyar (1949–1972) was an Irish bred, British-trained Thoroughbred racehorse and sire. He won The Derby, the St Leger Stakes, the King George VI & Queen Elizabeth Stakes, the Ormonde Stakes and the Eclipse Stakes setting a record for a single season's earnings in England. He stood at stud in Ireland and America, but failed to live up to expectations as a sire.

Tulyar was a brown horse bred by his owner HH Aga Khan III. He was sired by Tehran and was the first foal of the mare Neocracy by the undefeated racehorse and outstanding sire, Nearco. Tehran, won six races including the St Leger Stakes for earnings of £7,258 and he was a Champion Sire. Tulyar's dam, Neocracy won two races worth £2,562 as a two-year-old. She also produced several other winners including the 1959 Eclipse Stakes winner Saint Crespin III. Neocracy's dam, Harina, won the Imperial Produce Stakes of £4,128. Harina was a full sister to the Derby and St Leger winner, Trigo. Tulyar is inbred to Phalaris in the fourth remove of his pedigree.

Tulyar began his racing career by finishing unplaced in a race at Newmarket in Spring and then ran third in a race at Ascot in July. In August he was sent to York where he finished unplaced in the Acomb Stakes. In autumn, Tulyar was moved up in distance and won two races over one mile, taking Nursery Handicaps at Haydock and Birmingham. On his final appearance of the season, he finished second in the Horris Hill Stakes at Newbury.

In the Free Handicap, a rating of the best British two-year-olds, Tulyar was given a rating of 114 pounds, nineteen pounds below the top-rated Windy City.

On his three-year-old debut, Tulyar showed form well in advance of anything he had displayed in 1951 when he easily defeated the Middle Park Stakes winner King's Bench in the Henry VIII Stakes at Hurst Park. Tulyar did not run in the 2000 Guineas at Newmarket, in which King's Bench finished second to the French colt Thunderhead. Tulyar made his next appearance at Chester where he won the Ormonde Stakes by half a length from Nikiforos. Later in May he won the Lingfield Derby Trial by two lengths to establish himself as a contender for The Derby.

At Epsom, Tulyar started at odds of 11/2 for the Derby after a "last-minute plunge" made him favourite. Ridden by Charlie Smirke, he took the lead two furlongs from the finish and held off the late challenge of Gay Time to win by half a length in a time of 2 minutes 36.4 seconds. Shortly before the race, Smirke had sent a telegram to the Press Club which read "On Wednesday I will be saying to you What did I Tulyar". Tulyar was led into the winner's enclosure by his owner's son Prince Aly Khan. In July, Tulyar moved down in distance for the Eclipse Stakes over ten furlongs at Sandown and won "easily" from his stable companion Mehmandar. Later in the same month he contested the second running of the King George VI & Queen Elizabeth Stakes at Ascot. He won a "thrilling race" by a neck from Gay Time with the future Washington, D.C. International winner Worden in third.

In September, Tulyar started 10/11 favourite for the St Leger at Doncaster. He won by three lengths from Kingsford and eleven others.

At the end of the 1952 season, the Aga Khan sold Tulyar to the Irish National Stud for £250,000 which was a world record price up to that time for a Thoroughbred horse. It was originally planned that Tulyar would race in 1953, but the Irish government decided not to risk their investment and the horse was retired to stud.