| Honorific-Prefix: | The Honourable Mr Justice |
| John Barry Mortimer | |
| Honorific-Suffix: | ,,, |
| Office: | President of the Court of Appeal of Brunei Darussalam |
| Term Start: | 2010 |
| Term End: | 2018 |
| Predecessor: | Sir Noel Power |
| Successor: | Michael Burrell |
| Office2: | Judicial Commissioner of the Supreme Court of Brunei Darussalam |
| Term Start2: | 2005 |
| Term End2: | 2010 |
| Office3: | Non-Permanent Judge of the Court of Final Appeal of Hong Kong |
| Term Start3: | 1997 |
| Term End3: | 2015 |
| Office4: | Vice President of the Court of Appeal of Hong Kong |
| Term Start4: | 1997 |
| Term End4: | 1999 |
| Office5: | Justice of Appeal of the Court of Appeal of Hong Kong |
| Term Start5: | 1993 |
| Term End5: | 1997 |
| Office6: | Judge of the High Court of Hong Kong |
| Term Start6: | 1985 |
| Term End6: | 1993 |
| Birth Date: | 1931 8, df=y |
| Birth Place: | United Kingdom |
| Alma Mater: | Emmanuel College, Cambridge |
John Barry Mortimer, GBS, SPMB, OBE, QC (; born 7 August 1931) is a British barrister who has held senior judicial appointments in Hong Kong and Brunei Darussalam.
Mortimer was born in the United Kingdom in 1931. He was educated at St Peter's School, York.[1] He graduated from Emmanuel College, Cambridge with a BA in 1955.[2]
Mortimer was called to the Bar at the Middle Temple in England in 1956. He took silk in 1971. He was elected a Bencher of the Middle Temple in 1981.[1]
In 1985, Mortimer was appointed a Judge of the High Court of Hong Kong.[2]
From 1989 to 1995, Mortimer was a member of the Law Reform Commission of Hong Kong.[3]
In 1993, Mortimer was appointed a Justice of Appeal, and in 1997 became Vice President of the Court of Appeal of Hong Kong (a position in which he served until he retired from the Court of Appeal in 1999). Between 1997 and 2015, he was a Non-Permanent Judge of the Hong Kong Court of Final Appeal.[2]
In 2002, Mortimer was elected as a Senior Bencher of the Middle Temple.[1]
In 2005, Mortimer was appointed as a Judicial Commissioner of the Supreme Court of Brunei Darussalam.[4] Between 2010 and 2018, Mortimer served as President of the Court of Appeal of Brunei Darussalam.[5]
In 1999, Mortimer was awarded the Golden Bauhinia Star by the Chief Executive of Hong Kong.[2]
On retirement from the bench in 2018, Mortimer was awarded the Order of Seri Paduka Mahkota Brunei (First Class) by the Sultan of Brunei.[6]
In the 2019 New Year Honours, Mortimer was appointed OBE for services to law by Her Majesty Queen Elizabeth II.[7] [8] [9]