Zac Lomax (born 24 September 1999) is an Australian professional rugby league footballer who plays as a centre for the St George Illawarra Dragons in the National Rugby League (NRL).
Lomax is a graduate of the Illawarra Steelers' SG Ball team and was named in both the Australian Schoolboys and NSW Under-18s teams in 2016 and 2017. In 2017, Lomax was awarded NSWRL's Under-18s Player of the Year.