Luis Fenellosa Emilio (December 22, 1844 - September 16, 1918) was a Captain in the 54th Massachusetts Volunteer Infantry, an American Civil War Union regiment.

Emilio was born on December 22, 1844, in Salem, Massachusetts, the son of a Spanish immigrant who made his living as a music instructor.

[1] Emilio was among the group of original officers of the 54th selected by Massachusetts War Governor John Albion Andrew.

General T. Seymour, commander of the United States forces wrote from Morris Island, South Carolina on November 7, 1863: "Upon leaving the ditch for the parapet, they obstinately contested with the bayonet our advance.

He died in New York on September 16, 1918, after a long illness, and was buried in the Harmony Grove Cemetery in Salem, Massachusetts.