This paper is an attempt to determine the age of the Ijebu Kingdom through a consideration of extant king-lists. In the absence of contemporary documentary evidence for the earlier period internal mechanisms, basically anthropological, have been employed as analytical tools. The paper concludes with the establishment of a dynastic chronology from the second half of the fifteenth century, and dating the foundation of the kingdom by implication from this period. This conclusion is consistent with inferences from external sources derived from Benin.