The Marquis of Pombal Square (Portuguese: Praça do Marquês de Pombal) is an important roundabout in the city of Lisbon, Portugal. It is located between the Avenida da Liberdade (Liberty Avenue) and the Edward VII Park in the former parish of Coração de Jesus and in the quarter of Santo António.

The square is the radiating point for various important avenues: Liberdade, Duque de Loulé and Fontes Pereira de Melo, as well as the streets Braamcamp and Joaquim António de Aguiar.

The Blue and Yellow lines (Linha Azul and Linha Amarela) of the Lisbon Metro (Metropolitano de Lisboa) stop at Marquês de Pombal station, which was called Rotunda until March 1998. Eighteen bus lines operated by Carris also serve the square.

Its name is a reference to Sebastião José de Carvalho e Melo, 1st Marquis of Pombal, 1st Count of Oeiras, the powerful prime-minister who ruled Portugal from 1750 to 1777.