|The Rt Revd
|Bishop of Southwark|
|Diocese||Anglican Diocese of Southwark|
|In office||14 December 1980–1991|
|Other posts||Honorary assistant bishop in Worcester (1991–present)
Bishop of Newcastle
|Consecration||6 January 1973|
|Born||16 August 1926|
|Alma mater||Trinity College, Oxford|
Ronald Oliver Bowlby (born 16 August 1926) was the ninth Bishop of Newcastle  from 1973 until 1980, who was then translated to Southwark  where he served until his retirement eleven years later in 1991.
Bowlby was educated at Eton and Trinity College, Oxford, his first post after ordination was as a curate at St Luke's, Pallion, Sunderland 1952-1956. Bowlby was nominated to Newcastle on 27 November 1972 and consecrated 6 January 1973. He translated to Southwark on 14 December 1980.
He is interesting in housing matters and served as President of the National Federation of Housing Associations from 1988 to 1984 and of the Churches' National Housing Coalition from 1991 to 1994. 
- Birmingham Post – Give us this day our new daily prayer
- "Who's Who 1992 "(London, A & C Black ISBN 0-7136-3514-2)
- "Debrett's People of Today 1992" (London, Debrett's) ISBN 1-870520-09-2)
- The Times, Wednesday, Feb 07, 1973; pg. 18; Issue 58701; col A Court Circular
- Stockwood successor is appointed The Times Wednesday, Jul 23, 1980; pg. 16; Issue 60684; col D
- He was then Priest in charge of St Aidan, Billingham (1956-1966) and Vicar of Croydon (1966-1972) before his elevation to the Episcopate.Crockford's clerical directory London, Church House 1975 ISBN 0-19-200008-X
- Who's Who, 2013. p. 247. ISBN 978-1-408-15491-5.
- Who's Who, 2013.Address given as 4 Uppington Avenue, Shrewsbury.