Cystic lymphangioma also known as cystic hygroma, is a congenital malformation of lymphatic system. Most lymphangioma are present at birth and are diagnosed by the age of 2 years. They are usually located in the head and neck region and are rare in other location. We are reporting a case of cystic lymphangioma in breast and axillary region in a 23 years old female. Physical examination revealed a non-tender cystic mass in axilla and upper outer quadrant of left breast. Ultrasonography (USG) revealed a hypoechoic mass lesion and magnetic resonance imaging (MRI) showed a multi-spectated cystic mass in left axilla closely involving the left breast parenchyma. Wide local excision was done and histopathological examination further confirmed the diagnosis of cystic lymphangioma. Although it is very rare, cystic lymphangioma should be considered in the differential diagnosis of mass in breast and axillary region.