The season featured 10 teams.PK-35 Vantaa were promoted from the 2019 Naisten Ykkönen as league winners while PK-35 (women) were promoted after defeating IK Myran at the 2019 playoff.

IK Myran and ONS were relegated from the previous season.

Source: Suomen Palloliitto (Finnish Football Association) Archived 2020-05-08 at the Wayback Machine The 10 teams played each other twice.

The ninth placed team, JyPK engaged the Ykkönen runners-up, VIFK in a two-legged play-off to decide if they will remain in the league.

JyPK won 7–1 on aggregate and remained in the league.