Albert Septimus "Sep" Aspinall (7 December 1907 – c. second ¼ 1976) was an English professional rugby league footballer who played in the 1920s and 1930s.
He played at club level for York, Leeds, Huddersfield and Featherstone Rovers, as a centre, second-row, or loose forward.
Septimus Aspinall's birth was registered in York district, Yorkshire, he served in the Military Police during World War II, and his death was registered in York district, North Yorkshire, England.
Septimus Aspinall did not play (injury/suspension) in York's 8-22 defeat by Halifax in the 1930–31 Challenge Cup Final during the 1930–31 season at Wembley Stadium, London on Saturday 2 May 1931, in front of a crowd of 40,368.
Septimus Aspinall was suspended, and so he didn't play in Leeds' 5-5 draw with Wakefield Trinity in the 1934 Yorkshire Cup Final during the 1934–35 season at Crown Flatt, Dewsbury on Saturday 27 October 1934, he returned from suspension (and Joe "Chimpy" Busch returned from injury) and played loose forward in the 2-2 draw with Wakefield Trinity in the 1934 Yorkshire Cup Final replay during the 1934–35 season at Fartown Ground, Huddersfield on Wednesday 31 October 1934, and he played at second-row in the 13-0 victory over Wakefield Trinity in the 1934 Yorkshire Cup Final second replay during the 1934–35 season at Parkside, Hunslet on Wednesday 7 November 1934.