Cognomen Tangko (Tangko 
) , in the world, is a rare last name. The surname Tangko is characteristic of South-eastern Asia, particularly Indonesia, where it is a rare surname, Philippines, where it is a very rare surname, and Malaysia, where it is an extremely rare surname. Measured by absolute frequency, the name is most common in Indonesia, Philippines, and Nigeria. Much less frequently, Tangko is the forename as well as the last name.