Isabella of Austria (July 18, 1501 – January 19, 1526), also known as Elizabeth, Archduchess of Austria and Infanta of Castile and Aragon, is Queen of Denmark, Sweden and Norway as the wife of King Christian II.

She is the daughter of King Philip I and Queen Joanna of Castile and the sister of Emperor Charles V. She was born at Brussels.

She serves as regent of Denmark in 1520.