Linda June Mackenzie, OAM (born 14 December 1983) is an Australian freestyle swimmer. She preferred the longer 200-, 400-, and 800-metre events and won the Australian 400-metre national title five years in a row (2004–2008). She was part of the Australian team that won the gold medal in the 4×200-metre freestyle relay at the 2006 Commonwealth Games in Melbourne and has picked up silver medals in the same event at the 2003 and 2005 world championships.