Auguste Moïse Daumain (31 July 1877 in Selles-sur-Cher, date of death unknown) was a French racing cyclist who competed in the late 19th century and early 20th century. He participated in Cycling at the 1900 Summer Olympics in Paris and won the bronze medal in the men's 25 kilometre race. In the men's sprint, he finished third in the second heat and third in the fourth heat in the quarterfinals. In the 1904 Tour de France, he finished sixth at the general classification.