The 2018–19 Adelaide United W-League was the club's eleventh season in the W-League, the premier competition for women's football in Australia.

The team played home games at Marden Sports Complex and Coopers Stadium.

Note: Flags indicate national team as defined under FIFA eligibility rules; some limited exceptions apply.

Players may hold more than one non-FIFA nationality.

Last updated: February 2019, end of regular season.