Marco Enrico Bossi (25 April 1861 – 20 February 1925, at sea) was an Italian organist and composer. Bossi was born in Salò, province of Brescia. His father was organist of the Duomo (Large Parish Church) in Salo, which has a one-manual organ built by Fratelli Serassi in 1865 (opus 684), and restored in 2000/1. He was Director of the Musical High School (Liceo Musicale) of Venice from 1895 to 1902, of Bologna from 1902 to 1911, and of Rome from 1916 to 1925. He died at sea while returning to Italy from New York. His pupils included Gian Francesco Malipiero.