Fibrous dysplasia (FD) is a benign fibro–osseous bone ailment. It is characterised by the conversion of normal bone by disproportionate proliferation of cellular fibrous connective tissue which is gradually restored by bone or osteoid. The clinical characteristics are pain, deformities and pathological fractures. It has three types, monostotic, polyostotic and craniofacial form. Polyostotic forms are associated with hyperpigmentation and endocrinological pathology. FD is usually observed in adolescents and young adults and comprises 7% of benign bone tumors.  FD has a predilection for long bones plus craniofacial skeleton. The etiology of FD is not clear but predisposition of genetic etiology is suspected. The diagnosis of FD is based on radiological and histopathological examination. There are various treatment approaches including monitoring, surgical recontouring for esthetic and functional purposes. We are presenting a case of fibrous dysplasia of the maxilla on left side with clinical, radiological and histopathological features