| Honorific-Prefix: | The Right Honourable |
| Sir Roger Ormrod | |
| Office: | Lord Justice of Appeal |
| Term Start: | 1974 |
| Term End: | 1982 (retired) |
| Birth Date: | 20 October 1911 |
| Death Date: | 6 January 1992 |
| Nationality: | British |
| Spouse: | Anne Lush |
| Alma Mater: | The Queen's College, Oxford |
| Profession: | barrister |
| Committees: | Lord Chancellor's committee on legal education (chair, 1968) |
| Branch: | Royal Army Medical Corps |
| Serviceyears: | 1942–1945 |
| Rank: | major |
| Unit: | deputy assistant director of medical services, 8th Corps |
Sir Roger Fray Greenwood Ormrod, PC (20 October 1911 - 6 January 1992) was a British Lord Justice of Appeal.
Ormrod was educated at Shrewsbury School and the Queen's College, Oxford. Although he had studied law at university, his father insisted that he train as a doctor.
After serving in the Royal Army Medical Corps during the Second World War, he returned to legal practice, specialising in divorce cases and becoming Queen's Counsel in 1958. In 1961 he was appointed a judge of the Probate, Divorce and Admiralty Division, and in 1974 a Lord Justice of Appeal. He was a significant figure in the development of the jurisprudence of no-fault divorce in the English courts.
His best known finding came in the divorce case of Corbett v Corbett (1971), in which the wife was a transgender woman. Ormrod held that, for the purpose of marriage, sex was to be legally defined by three factors that he called 'biological' – namely chromosomal, gonadal and genital. Any 'operative intervention' was to be ignored, as were any 'psychological factors' (in that case identified with 'transsexualism').[1] He said:
On the basis of the medical evidence, Ormrod held that the wife was not a woman for the purposes of marriage but a biological male, and had been so since birth. Accordingly, as the relationship called marriage "is and always has been recognised as the union of man and woman", the marriage was void ab initio.
Ormrod was for many years the chairman of the very successful Notting Hill Housing Trust a charitable housing association then operating mostly in RBK&C and the LB Hammersmith and Fulham.