7. Chad
Chad ranks 7th on our list of most ethnically diverse countries in the world in 2018. It is another very ethnically diverse country with hundreds of ethnic groups. The Sara and the Arabas are the most populous ethnic groups in Chad, according to WorldAtlas, and it makes up for about 28% of the entire population. A significant part of the group still practices traditional faiths. The Arabs constitute about 12% of Chad’s population and they are subdivided into three groups: the Hassuna, the Juhayna, and the Awlad Sulayman. Approximately, there are about 180 ethnic groups and over one hundred languages are spoken in the country. Other important ethnic groups besides the Sara and the Arabs include Daza, Mayo-Kebbi, Kanem, Bornou, etc.