Dom Inácio do Nascimento de Morais Cardoso (20 December 1811 – 23 February 1883) was a Cardinal of the Roman Catholic Church and was Patriarch of Lisbon.

Morais Cardoso was born in Murça, Portugal, the son of Hipólito de Morais Cardoso, Captain-Major of Murça, and wife Eufémia Joaquina.

He served as treasurer of the church of São Roque da Misericórdia as well as chaplain and confessor of King Pedro V of Portugal and was treasurer of the Royal Chapel of the Palace of Necessidades.

He was consecrated on 14 February 1863 in Lisbon, by Cardinal Manuel Bento Rodrigues da Silva.

He was created and proclaimed Cardinal-Priest of Santi Nereo e Achilleo in the consistory of 22 December 1873 by Pope Pius IX.