As with the spoken languages, the ethnic group composition also remains a point of debate, mainly regarding the largest and second largest ethnic groups, the Persians and Azerbaijanis, due to the lack of Iranian state censuses based on ethnicity.
Seperti dengan bahasa lisan, komposisi kelompok etnis juga tetap menjadi titik perdebatan, terutama mengenai kelompok etnis terbesar dan terbesar kedua, Persia dan Azerbaijan, karena kurangnya sensus pemerintah Iran berdasarkan etnis.