William James Bailey (6 April 1888 – 21 February 1971) was a British cyclist.

He competed in three track sprint events at the 1908 Summer Olympics, but failed to reach the finals.

Bailey turned professional in March 1914, but could not compete due to World War I.

In 1920, he won a bronze medal in the sprint at the world championships,[2] and in 1928, aged 40, he set a British sanding start half-mile record at 58 seconds.

[3] This biographical article related to United Kingdom cycling is a stub.