Sancha of Portugal was a 12th-century Portuguese infanta and Cistercian nun who served as an abbess. Born in 1180 to King Sancho I and Dulce of Aragon, she held the title of Lady of Alenquer. Following the death of her father, she and her sisters engaged in legal and territorial disputes with their brother, King Afonso II, regarding their inherited estates. She eventually used much of her significant wealth to establish the Monastery of Santa Maria de Celas near Coimbra.