The 2017–18 Youth League U18 (formerly known as I-League U18) was the tenth season of the Indian Youth League U18 and the third season of the competition as an under-18 one. AIFF announced that the zonal rounds for the league that started from 20 November 2017 in Chennai, Maharashtra, Kolkata and Delhi. AIFF Elite Academy were three-time defending champions, but did not participate in the tournament. Shillong Lajong won their first title by defeating Kerala Blasters 2–0 in the final on 26 May 2018.