Louis Cyr (French pronunciation: ; born Cyprien-Noé Cyr, October 10, 1863 - November 10, 1912) was a French Canadian strongman with a career spanning the late 19th and early 20th centuries. His recorded feats, including lifting 500 pounds (227 kg) (1/4 ton) with one finger and backlifting 4,337 pounds (1,967 kg)(2.1 tons), show Cyr to be, according to former International Federation of BodyBuilding & Fitness chairman Ben Weider, the strongest man ever to have lived.
Cyr was born in Saint-Cyprien-de-Napierville, Quebec, Canada. Coming from a robust French-Acadian family, he began developing extraordinary strength at an early age. While Louis' father was of average proportions, his mother was almost Amazonian, recorded as weighing 265 pounds (120 kg) at 6'1" (185 cm). She in turn had a father of 6'4" (193 cm) and 260 pounds (118 kg). From the age of 12 Cyr worked in a lumber camp during the winters and on the family’s farm the rest of the year. Discovering his exceptional strength at a very young age, he impressed his fellow workers with his feats of strength. After learning of the tale, Cyr attempted to mimic the practice of legendary strongman Milo of Croton, who as a child carried a calf on his shoulders, continuing to carry it as it grew into a full-grown bull and he into a grown man. Cyr's calf, however, bolted one day, kicking him in his back, after which he instead began carrying a sack of grain ⁄4 mile (0.40 km) every day, adding 2 pounds (0.91 kg) each day. According to one of his biographers, his mother decided "he should let his hair grow, like Samson in the Bible". She curled it regularly.