Osmoderma barnabita is a species of the subfamily Cetoniinae found throughout in central Europe, eastern Europe, and western Russia.
Osmoderma barnabita is recorded in Albania, Austria, Belarus, Bosnia and Herzegovina, Bulgaria, Croatia, Czechia, Estonia, Finland, Germany, mainland Greece, Hungary, Latvia, Lithuania, Moldova, Montenegro, North Macedonia, Poland, Romania, Russian Federation (Central European Russia, East European Russia), Serbia, Slovakia, Slovenia, and Ukraine.
As of June 5, 2009, Osmoderma barnabita is near-threatened.