The 1979 Amco Cup was the 6th edition of the NSWRFL Midweek Cup, a NSWRFL-organised national club Rugby League tournament between the leading clubs and representative teams from the NSWRFL, the BRL, the CRL, the QRL and the NZRL.
A total of 16 teams from across Australia and New Zealand played 27 matches in a round-robin group format with the winners of each group advancing to a knockout stage, with the matches being held midweek during the premiership season.