Dennis Watkin Allsopp (13 February 1871 – 1921) was a footballer who played in The Football League for Nottingham Forest.
A goalkeeper, he also played for Derby Junction.
[1] Allsop made his league debut for Nottingham Forest at the Town Ground on 24 December 1892 in the 3–1 victory against Wolverhampton Wanderers.
In his last competitive appearance at West Bromwich Albion on 16 April 1900, Forest lost 8–0.
This biographical article related to association football in England, about a goalkeeper, is a stub.