Mario Pirani Coen (August 3, 1925 – April 18, 2015) was an Italian journalist, economist, and writer. He was born in Rome. After the experiences with Patrol, Il Giorno and Il Globo, he participated, together with Eugenio Scalfari, to create la Repubblica, a newspaper that became one of the first in Italy.
He was also editor of L'Europeo from 1979 to 1980, succeeding Giovanni Valentini.
In 1995 he won the Premiolino.
Pirani died in Rome, Italy, aged 89.