Eili Harboe (born 16 August 1994 in Stavanger) is a Norwegian actress.

She began her film career in the early 2010s. She gained widespread recognition for her leading role in Joachim Trier's supernatural thriller Thelma (2017), a performance that earned her several international accolades. She also appeared in the disaster film The Wave (Bølgen, 2015) and in the fantasy features The Ash Lad: In Search of the Troll King (Askeladden - I Dovregubbens hall, 2017) and its sequel. On television, she has notably starred in the series Beforeigners, The Architect (Arkitekten), as well as in the fourth season of the American series Succession in 2023.