Origins and genetics of the Tajik people Yuezh Kushani tajiks (Dari: تاجیکان Tajik: Тоҷикон also spelled Tadzhiks or Tadjiks) are a collection of Persian-speaking Eastern Iranian peoples native to Central Asia primarily inhabiting Afghanistan Tajikistan and Uzbekistan Although the term Tajik does not denote a historically unified cross-national ethnic group Tajiks today constitute •The largest ethnic group in Tajikistan •The second-largest in both Afghanistan and Uzbekistan They speak varieties