Colclough is a British surname. Notable people with this surname include:
Dave Colclough (1964–2016), Welsh professional poker player
Ephraim Colclough (1875–1914), English footballer
Harry Colclough (1888–1955), English international footballer
Jim Colclough (1936–2004), American footballer
John Henry Colclough (c.1769–1798), Irish revolutionary
Katie Colclough (born 1990), English cyclist
Mary Ann Colclough (1836–1885), New Zealand feminist and social reformer
Maurice Colclough (1953–2006), England international rugby union player
Michael Colclough (born 1944), Church of England clergyman
Phil Colclough (born 1940), English folk singer and songwriter
Ricardo Colclough (born 1982), American footballer
Ryan Colclough (born 1994), English footballer
Tom Colclough, Canadian musician
William Colclough
Colclough baronets
