Efik EF-ik is the indigenous language of the Efik people, who are situated in the present-day Cross River state and Akwa Ibom state of Nigeria, as well as in the North-West of Cameroon. The Efik language is mutually intelligible with other lower Cross River languages such as Ibibio, Annang, Oro and Ekid but the degree of intelligibility in the case of Oro and Ekid is unidirectional; in other words, speakers of these languages speak and understand Efik but not vice versa. The Efik vocabulary has been enriched and influenced by external contact with the British, Portuguese and other surrounding communities such as Balondo, Oron, Efut, Okoyong, Efiat and Ekoi (Qua).

The Efik are an ethnic group located primarily in southern Nigeria, and western Cameroon. Within Nigeria, the Efik can be found in the present-day Cross River State and Akwa Ibom state. The Efik speak the Efik language which is a member of the Benue–Congo subfamily of the Niger-Congo language group. The Efik refer to themselves as Efik Eburutu, Ifa Ibom, Eburutu and Iboku.