Sampson, also known as Mammoth, was a Shire horse from the mid-1800s, measuring 21.25 hands (7 feet, 2.5 inches) tall and weighing 3,360 pounds, making him the largest horse ever recorded.

According to the Guinness world records, the biggest horse in the world that ever lived was a shire horse named Sampson, born in Bedfordshire, England in 1846. He was a shire horse that reached a peak height of 21.5hh (219cm) across his wither.

Sampson (later renamed Mammoth) was a Shire horse gelding born in 1846 and bred by Thomas Cleaver at Toddington Mills, Bedfordshire, England. According to Guinness World Records (1986) he was the tallest horse ever recorded, by 1850 measuring 219.7 centimetres (7 ft 2.5 in) or 21.2-1/2 hands in height.