The 1990–91 Asia Cup was the fourth Asia Cup tournament, and was held in India between 25 December 1990, and 4 January 1991.

Three teams took part in the tournament: India, Sri Lanka and Asian leading associate member Bangladesh.

Pakistan had pulled out of the tournament due to strained political relations with India.

The 1990–91 Asia Cup was a round-robin tournament where each team played the other once, and the top two teams qualifying for a place in the final.

India and Sri Lanka qualified for the final in which India beat Sri Lanka by 7 wickets to win its second consecutive (and third in total) Asia Cup.