Family name Харкін (Harkin 
, Харкін 
) , throughout the world, is quite a common surname. The surname Харкін is characteristic of Ireland, where it is quite a common surname, the United Kingdom, where it is quite a rare surname, and Australia. Not in comparison with a country's population, it is commonest in the United Kingdom, Ireland, and the United States. Very seldom, Харкін is the forename as well as the last name.