Artur Kapp (28 February 1878 – 14 January 1952) was an Estonian composer.
Born in Suure-Jaani, Estonia, then part of the Governorate of Livonia, Russian Empire, he was the son of Joosep Kapp, who was also a classically trained musician. Kapp began his musical career studying organ at the Saint Petersburg Conservatory as a student of both Louis Homilius and composition with Nikolai Rimsky-Korsakov in 1891. Kapp graduated from the Conservatory in 1900 as a composer and from 1904 until 1920 worked as a music director in the southern Russian city of Astrakhan, then returning to Estonia as a professor and conductor at the Tallinn Conservatory where he counted among his students such future notable Estonian composers as Evald Aav, Edgar Arro, Gustav Ernesaks, Helen Tobias-Duesberg, Riho Päts and Enn Võrk. He is, along with Rudolf Tobias (1873-1918), generally considered to be one of the founders of Estonian symphonic music.
Kapp's son Eugen (1908–1996) and nephew Villem (1913–1964) became notable composers as well, having studied at the Tallinn Conservatory under direction of the elder Kapp.