Louis Émile Georges Gratia (17 September 1878 – 31 October 1962) was a French musician, composer, musicologist, musical editor and arranger.
Gratia was born in Lunéville, (Meurthe-et-Moselle).
His father was the painter Charles Louis Gratia (1815–1911) who, after his return to France in 1867, settled for a time in Lunéville and remarried.
His work won the attention and support of important French musicians and teachers like organist Charles-Marie Widor and pianist Isidor Philipp.
He died in Clichy (Hauts-de-Seine), in the suburbs of Paris.