Medical records of 23 dogs with histologically documented orbital neoplasia and admitted to the New York State College of Veterinary Medicine between 1975 and 1984 were reviewed. Almost all (91%) of the tumors were classified as malignant; 74% of the tumors arose as primary neoplasms within the orbit. Eleven tumor types of connective tissue, bone, epithelial, and hemolymphatic origin were represented. The typically afflicted dog was purebred, female, and middle-aged. Review of this series confirmed the clinical impression that orbital neoplasms in dogs are aggressive malignancies with poor long-term prognosis.