Óscar Tusquets Blanca or Óscar Tusquets i Guillén (°Barcelona, 1941) is a Spanish architect, painter and designer. He is the brother of the publisher and writer Esther Tusquets.
He studied at the Llotja School in the German School of Barcelona and in the ETSAB. In 1964 he founded the Studio PER with Lluís Clotet, with whom he collaborated on a regular basis until 1984. In 1987 he worked with architect Carlos Diaz.
He is graphic and industrial designer. He has been repeatedly awarded with the Golden Delta FAD Award and in 1987 he received the Creu de Sant Jordi.