 At the time of the 2001 census, Gamlingay parish had 3,535 inhabitants living in 1,410 households.The ethnic group of 99% was white, with 0.4% Asian or Asian British, 0.1% black or Black British, 0.3% mixed and 0.2% other.77% were Christian, 0.3% followed another religion and 22% cited 'no religion' or did not state one.