The 2019 Portland Thorns FC season was the team's and the league's seventh season of existence.

The Thorns play in the National Women's Soccer League (NWSL), the top division of women's soccer in the United States.

Due to construction at Providence Park, the Thorns would start the season with six consecutive away matches.

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

Players may hold more than one non-FIFA nationality.