Sydney Herbert Copley (1 November 1905 — 1 April 1986) was a first class cricketer who played one match for Nottinghamshire in 1930. He was born in Hucknall, Nottinghamshire, and died on the Isle of Man.
A right-handed batsman, he scored 4 and 3 in his only match and bowled 5 overs of slow left arm spin for 28 without success.
He fame rests on his appearance as 13th man for England on the final day of the 1930 Trent Bridge Test against Australia. He held a vital catch at mid on to dismiss Stan McCabe, changing the whole course of the match which England went on to win by 93 runs.