Cyril Bibby (born Harold Cyril Bibby, 1 May 1914, died Edinburgh 20 June 1987) was a biologist and educator. He was also one of the first sexologists.

Harold Cyril Bibby was born in Liverpool and educated at Liverpool Collegiate School, and Queens' College Cambridge (B.A. 1935, M.A. 1939). He was an active member of the C.U. Socialist Society and of the Union Society.

• pre-war: taught science and biology at Oulton School, Liverpool and Chesterfield Grammar School, Derbyshire.
• 1941-1946: Education Officer to the British Society of Hygiene Council and then to the Central Council for Health Education
• 1946-1959: Lecturer at the College of S. Mark and S. John (University of London Institute of Education)
• 1959-1977: Principal of Kingston upon Hull College of Education from 1959, becoming Pro-Director when it merged into Hull College of Higher Education

Bibby gained an M.Sc. at the University of Liverpool in 1940 for research on Europe in Quaternary times, and a Ph.D at London University in 1955 for a thesis on T.H. Huxley. He wrote books and articles on Huxley, and on human biology, especially in the fields of health and sex education. In 1936 he married Frances (Florence Mabel) Hirst (Girton 1932-1935, b.1914, d.1993); they had two sons and two daughters.

The Bibby papers are housed at Cambridge University Library [1]