Mahalia Cassidy (born 9 October 1995) is an Australian netball player in the Suncorp Super Netball league, playing for the Sunshine Coast Lightning.
Cassidy made her debut at the elite level in the ANZ Championship, playing for the Firebirds as a temporary replacement player for several games in the 2015 season. She joined the Firebirds permanently the following year and played six matches, culminating in a premiership title in 2016. However, she suffered a serious knee injury that kept her out of the entire 2017 season. She returned to the team the following year and has remained in the Firebirds' mid-court set-up since then.