Birnbaum may refer to: Places Birnbaum an der Warthe, now Międzychód, Greater Poland Voivodeship, Poland Kreis Birnbaum, an administrative district of the Grand Duchy of Posen and, later, the Prussian province of Posen Birnbaum (Frankenwald), an unincorporated area in Kronach, Bavaria, Germany Birnbaum (Gummersbach), a district of Gummersbach, North Rhine-Westphalia, Germany Birnbaum (Lesachtal), a village in Lesachtal, Carinthia, Austria Hrušica (plateau) (German: ), in Slovenia Other uses Birnbaum (painting), by Gustav Klimt Birnbaum (surname) See also Barenboim (surname) Bernbaum Berenbaum