Cyril Henry Atwell Porter (12 January 1890 – 16 January 1964) was a British track and field athlete who competed mainly long-distance running.

He was born in Bridstow, Herefordshire.

[1][2] He competed for Great Britain in the 1912 Summer Olympics held in Stockholm, Sweden in the 3000 metre team, where he won the bronze medal with his teammates Joe Cottrill and George Hutson.

Porter studied at Brasenose College, Oxford.

This article about an Olympic medallist in athletics of the United Kingdom is a stub.