Afghanistan is a multiethnic and mostly tribal society. The population of the country consists of numerous ethnolinguistic groups: mainly the Pashtun, Tajik, Hazara, and Uzbek, as well as the minorities of Aimaq, Turkmen, Baloch, Pashai, Nuristani, Gujjar, Brahui, Qizilbash, Pamiri, Kyrgyz, Sadat, Mongol and others. Altogether they make up the Afghan people.

A multinational state or a multinational union is a sovereign entity that comprises two or more nations or states. This contrasts with a nation state, where a single nation accounts for the bulk of the population. Depending on the definition of "nation", a multinational state is usually multicultural or multilingual, and is geographically composed of more than one country, such as the countries of the United Kingdom.