The main island , Santorini has an area of 75.8 km2 ( 29.3 sq mi ) km2 , Therasia 9.3 km2 ( 3.6 sq mi ) , and the uninhabited islands of Nea Kameni 3.4 km2 ( 1.3 sq mi ) , Palea Kameni 0.5 km2 ( 0.19 sq mi ) and Aspronisi 0.1 km2 ( 0.039 sq mi ) .
The main island , Santorini has an area of 75.8 km2 ( 29.3 sq mi ) km2 .