Hartmut Geerken (born 15th of January 1939 in Stuttgart, Germany; died on October 21, 2021 in Wartaweil, Germany) was a musician, composer, writer, journalist, playwright, and filmmaker.

Worked for the Goethe Institute in Cairo (1966-72), Kabul (1972-1979), and Athens (1979-1983). The years in Egypt seemed to be particularly musically significant as he brought The Sun Ra Arkestra there in 1971, and also co-founded the The Cairo Jazz Band and The Cairo Free Jazz Ensemble.

Married to Sigrid Hauff, father of Olaf Geerken.