There are three distinct systems of law in Nigeria:
Derived from its British colonial past, and a development of its own after independence;
Derived from indigenous traditional norms and practice, including the dispute resolution meetings of pre-colonial Yorubaland secret societies and the Ẹ̀kpẹ̀ and Ọ̀kọ́ńkọ̀ of Igboland and Ibibioland;
Used only in the predominantly Muslim northern states of the country. It is an Islamic legal system that had been used long before the colonial administration. In late 1999, Zamfara emphasised its use, with eleven other northern states following suit. These states are Kano, Katsina, Niger, Bauchi, Borno, Kaduna, Gombe, Sokoto, Jigawa, Yobe, and Kebbi.
The country has a judicial branch, the highest court of which is the Supreme Court of Nigeria.