| Justinian Oxenham | |
| Honorific-Suffix: | ISO |
| Office1: | Secretary of the Postmaster-General's Department |
| Term Start1: | 1 January 1911 |
| Term End1: | 17 December 1923 |
| Birth Date: | 23 April 1860 |
| Birth Place: | Warwick, Queensland |
| Death Place: | Kew, Melbourne, Victoria |
| Resting Place: | Boroondara General Cemetery |
| Occupation: | Public servant |
| Nationality: |  Australian |
| Spouse: | Annie Elizabeth Robinson (m. 1885) |
Justinian Oxenham ISO (23 April 186027 March 1932) was a senior Australian public servant. He was Secretary of the Postmaster-General's Department from January 1911 until December 1923.
Oxenham was born in Warwick, Queensland, on 23 April 1860.[1]
In the year of Australia's federation, Oxenham was appointed as Chief Clerk of the Postmaster-General's Department.
In January 1911 he was promoted to Secretary, heading the Postmaster-General's Department. In the position, he represented the Commonwealth at the International Postal Conference in Madrid in February 1921.[2]
Oxenham retired from the Commonwealth Public Service in 1923.[3]
On 27 March 1932, Oxenham died at home in Charles Street Kew, Melbourne.[1] [4] He was buried at Boroondara General Cemetery.
Oxenham was awarded the distinction of the Imperial Service Order for his public service.[5]