Iseyin (ēsāˈăN) [key], town (1991 est. pop. 192,000), SW Nigeria. The city, located in a tobacco-growing region, has an important traditional textile industry. Iseyin was the capital of a small Yoruba kingdom under the Oyo empire. In 1893 it came under British control. A rebellion in 1916 against British-imposed taxes was quelled.