Marco Formentini (14 April 1930 – 2 January 2021) was an Italian politician. He was a member of the Northern League, then for the Democrats and finally for The Daisy. He was born in La Spezia, Italy.
He was a member of the Italian parliament from 1992 to 1993. He later was a member of the European Parliament from 1994 to 2004. From 1993 to 1997, Formentini was Mayor of Milan.
Formentini died on 2 January 2020 in Milan, aged 90.