John McArdle (born August 16, 1949 in Liverpool) is a British actor. He is most notable for playing Billy Corkhill in the soap-opera Brookside, with many other smaller appearances in other soaps and dramas. Playing a regular character in Brookside's heyday (alongside Ricky Tomlinson and Sue Johnston, and working with writers such as Jimmy McGovern), he burned himself into the viewers' memories with his portrayal of a man beyond breaking point, which culminated with him ranting at neighbours and churning up their lawns, as he drove his car around in circles.

McArdle is also an accomplished stage actor, recently seen in Our Country's Good at the Liverpool Playhouse.