Theo de Rooij (born 25 April 1957 in Harmelen) is a retired Dutch former bicycle racer and former manager of the Rabobank cycling team - a position from which he resigned after the 2007 Tour de France.
De Rooij was a professional rider from 1980 to 1990.
He started his career in Belgian teams and the last eight years of his careers he served teams managed by Peter Post.