Luntz was educated at Athlone Boys' High School in Johannesburg and graduated from the University of Witwatersrand with degrees in arts and law.
This text is widely quoted in the highest courts of Australia, as well as England, Canada and the United States.
Long after officially retiring from University work, he continued to maintain an office, teach, write essays and mark exams.
The Harold Luntz Graduate Rearch Thesis Prize, named in honour, is awarded annually to the Melbourne Law School graduate research student judged to have presented the best thesis in the previous year.
On Australia Day (the 26th of January),[6] he was awarded an AO for "distinguished service to legal education, as an academic and editor, to professional development, and to the community."