| Honorific-Prefix: | The Honourable |
| Jack Hallam | |
| Office: | Minister for Agriculture |
| Term Start: | 29 February 1980 |
| Term End: | 25 March 1988 |
| Premier: | Neville Wran Barrie Unsworth |
| Predecessor: | Don Day |
| Successor: | Ian Armstrong |
| Office1: | Minister for Lands |
| Term Start1: | 4 July 1986 |
| Term End1: | 25 March 1988 |
| Premier1: | Barrie Unsworth |
| Predecessor1: | John Aquilina (as Minister for Natural Resources) |
| Successor1: | Garry West |
| Office2: | Minister for Forests |
| Term Start2: | 5 November 1986 |
| Term End2: | 25 March 1988 |
| Premier2: | Barrie Unsworth |
| Predecessor2: | John Aquilina (as Minister for Natural Resources) |
| Successor2: | Garry West |
| Office3: | Vice President of Executive Council Leader of the Government in the Legislative Council |
| Term Start3: | 5 November 1986 |
| Term End3: | 25 March 1988 |
| Predecessor3: | Barrie Unsworth |
| Successor3: | Ted Pickering |
| Office7: | Minister for Fisheries |
| Term Start7: | 2 October 1981 |
| Term End7: | 4 July 1986 |
| Premier7: | Neville Wran |
| Predecessor7: | New portfolio |
| Successor7: | Janice Crosio (as Minister for Water Resources) |
| Office8: | Minister for Decentralisation |
| Term Start8: | 19 October 1978 |
| Term End8: | 29 February 1980 |
| Premier8: | Neville Wran |
| Predecessor8: | New portfolio |
| Successor8: | Don Day |
| Office9: | Member of the New South Wales Legislative Council |
| Term Start9: | 23 April 1973 |
| Term End9: | 12 September 1991 |
| Successor9: | Eddie Obeid |
| Birth Date: | 1942 9, df=yes |
| Birth Place: | Griffith, New South Wales, Australia |
| Birthname: | Jack Rowland Hallam |
| Occupation: | Farmer |
| Nationality: | Australian |
| Party: | Labor |
| Children: | 2 daughters |
Jack Rowland Hallam (born 10 September 1942), a former Australian politician, was a member of the New South Wales Legislative Council from 1973 to 1991 representing Labor. Hallam held several ministerial posts in the state governments led by Neville Wran and Barrie Unsworth, notably Minister for Agriculture.
Born in Griffith, New South Wales, Hallam worked as an apprentice plumber in 1956, a roustabout and wool classer from 1956 to 1959, a contract harvester and share farmer from 1959 to 1964, and a sheep farmer from 1967 to 1976. At various times he held membership of the Australian Workers' Union and the Federated Clerks' Union.
In 1973 Hallam was appointed to the New South Wales Legislative Council to represent the New South Wales Labor Party. Five years later, Neville Wran having by this stage become Premier, Hallam was appointed Minister for Decentralisation, moving to Agriculture in 1980. He remained Agriculture Minister until 1988; he was also minister for Fisheries (1981 - 86), Lands (1986 - 88), Forests (1986 - 88) and Vice-President of the Executive Council (1986 - 88). He was also Deputy Leader of the Government in the Legislative Council (1978 - 86), and Leader (1986 - 88).[1]
In 1984, as the NSW Minister for Agriculture and Forestry, Hallam instigated a commemorative award, called the McKell Medal, in honour of the contribution that Sir William McKell had made to the development of a soil and water conservation ethic within Australia.[2]
Hallam continued to lead the Opposition in the Legislative Council until he retired from politics in 1991.