Oskar Gottlieb Blarr (born 6 May 1934) is a German composer, organist, church musician and academic teacher.

[3] He continued his studies, conducting with Dean Dixon and Herbert von Karajan in Salzburg, composition with Bernd Alois Zimmermann in Cologne, Krzysztof Penderecki at the Folkwang-Hochschule in Essen, and Milko Kelemen and Günther Becker [de] at the Robert Schumann Hochschule.

[2] Blarr composed four oratorios about the life of Jesus, four symphonies, chamber music and works for organ.

[4] He also set many songs of the genre Neues Geistliches Lied to music, some of under the pseudonym Choral Brother Ogo.

[6] In 1983, the Israeli composer Josef Tal dedicated his organ work Salva Venia to Blarr, who premiered it the following year in Düsseldorf.