Mastocytomas are solitary mast cell tumors that are generally seen on the trunk and extremities. Childhood-onset mastocytomas of the scalp are extremely rare. We report a case of a one-and-a-half-year-old toddler boy that presented with a yellow-brown plaque on his scalp. Pathological evaluation s revealed mast cell accumulation in the upper dermis. These cells were uniform with a fried-egg appearance and had visible cytoplasmic granules with Wright-Giemsa staining. This study demonstrates the difficulty of diagnosing soli¬tary mastocytomas as it is a very rare disease and has non-specific clinical findings. In this study, a child with a rare solitary cutaneous mastocytoma on the scalp was evaluated and a review of previous literature was conducted.