William Cosgrove (1855 – 1927) was a Scottish professional golfer who played in the late 19th century.

He was the son of Alexander Cosgrove, a maker of golf clubs, and his wife Janet Nelson.

He married Mary Jane Quin in 1878 and was employed as a maker of golf balls.

Jamie Anderson won the Championship for the second successive year, by two strokes from runner-up Bob Kirk.

After two rounds, three players were level on 80: Brown, Ferguson and Cosgrove with Anderson and Bob Pringle only two behind.