Arrowsmith Island (, ) is a mostly ice-covered island in the Pitt group of Biscoe Islands, Antarctica. It is 2.53 km long in west-southwest to east-northeast direction and 900 m wide.
The island is named after the British cartographer Aaron Arrowsmith (1750-1823) who published a map of the south polar region in 1794.
Arrowsmith Island is located at , 1.43 km southeast of Pickwick Island, 500 m south of Tupman Island and 900 m northwest of Fizkin Island. British mapping in 1971.