Basil Oliver Allen (13 October 1911 – 1 May 1981) was an English first-class cricketer.
A left-handed batsman and fine close fieldsman, he played for Cambridge University Cricket Club in 1932 and 1933.
He also played first-class matches for Marylebone Cricket Club from 1936 to 1939 and the Gentlemen in 1938.
Allen scored 14 first-class hundreds, with his only double century, 220, coming against Hampshire in 1947.
This biographical article related to an English cricket person born in the 1910s is a stub.