Septimus Atterbury (18 October 1880 – 1964) was an English footballer who made 88 appearances in the Football League for Loughborough, Barnsley, Leicester Fosse and Plymouth Argyle, and 410 in the Southern League for Swindon Town and Plymouth Argyle.

He began his football career with Kettering before representing Loughborough, Barnsley, Wellingborough, and Leicester Fosse.

He would feature for the club as a player until 1921; making 361 appearances in all competitions and scoring six goals.

He gained a reputation for what was at the time an unconventional approach to training, which focused on stamina-building, but was considered "a great success".

[2] He served the club in this capacity until his retirement in 1937, by which time Argyle had become an established Football League Second Division side.