The 2017–18 Liga Națională was the 60th season of Liga Națională, the top-level women's professional handball league. The league comprises 14 teams. CSM București were the defending champions, for the third season in a row.
The 11th and 12th-placed teams of the Liga Națională faced the 2nd and 3rd-placed teams of the Divizia A, from both Seria A and Seria B. The first place from each play-off group promoted to Liga Națională.