Conrad Johan Bartholdy (12 March 1853 – 6 December 1904) was a Danish Danish organist, composer, singing teacher, conductor and author of music theory books. He was a Titular Professor in 1900.
Bartholdy was born in Hammel, the son of the local pharmacist and was active as a student in Århus Cathedral from 1872. He began after school to study political science, but interrupted his studies to get a musical education. Among his teachers were Carl Helsted (vocals), Johann Christian Gebauer (theory), Edmund Neupert (piano) and Gottfred Matthison-Hansen (organ).