| Type: | bishop |
| Cyril Conrad Cowderoy | |
| Archbishop of Southwark | |
| Archdiocese: | Southwark |
| See: | Southwark |
| Appointed: | 12 December 1949 |
| Term Start: | 21 December 1949 |
| Term End: | 10 October 1976 |
| Predecessor: | Peter Emmanuel Amigo |
| Successor: | Michael George Bowen |
| Ordination: | 30 May 1931 |
| Consecration: | 21 December 1949 |
| Consecrated By: | Bernard William Griffin |
| Birth Date: | 5 May 1905 |
| Birth Place: | Sidcup, Kent, England, United Kingdom |
| Nationality: | British |
| Religion: | Roman Catholic |
Cyril Conrad Cowderoy (5 May 1905 - 10 October 1976) was a priest for over 45 years and a bishop for over 26 years in the Roman Catholic Church in England and Wales.
Born in Sidcup, Kent, on 5 May 1905, he was consecrated and ordained as a parish priest in Southwark on 30 May 1931 by Cardinal Bernard William Griffin and Bishops Beck and Farren. On 12 December 1949 he was appointed Bishop of Southwark.
In 1964, he opened St. Michael and All Angels Catholic Church, in Locksbottom, Kent, inside of which is a commemorative plaque.
On 28 May 1965, aged 60, he was appointed as the first metropolitan Archbishop of Southwark by Pope Paul VI. He was Grand Prior for England and Wales of the Knights of the Order of the Holy Sepulchre of Jerusalem. Archbishop Cowderoy died in office on 10 October 1976, aged 71.
Archbishop Cowderoy consecrated or co-consecrated the following bishops (all deceased):