Auguste Brancart was a Belgian professional road cyclist who was active in the early 20th century. Born in Belgium, his competitive career spanned approximately from 1908 to 1913, an era that marked the formative years of many major European cycling races.
Brancart is primarily recognized for his participation in several prestigious one-day classics and Grand Tours. He notably competed in Liège–Bastogne–Liège, one of cycling's oldest Monuments, achieving finishes such as 14th place in 1908, 16th in 1910, and 17th in 1911. He also started in the Tour de France twice, in 1908 and 1909, but did not complete either edition.
During parts of his career, Brancart rode for prominent teams of the era, including Alcyon-Dunlop in 1908 and 1909, which was a dominant force in professional cycling during the Belle Époque. While not among the most famous champions, Brancart was a consistent presence in the professional peloton of early 20th-century cycling.