Kogin Okpara wani kogi ne na Benin. Asalinta a cikin Sashen Borgou, yana kwarara zuwa kudu kuma ya zama kan iyaka tsakanin Najeriya da Benin kafin ya sake shiga cikin Benin ya kwarara zuwa Kogin Ouémé, wanda ƙarshe ya malala zuwa Tekun Atlantika. Garuruwa da dama da ke bakin kogin suna takaddama tsakanin Benin da Najeriya. Rand McNally, The New International Atlas, 1993. Guo, Rongxing (6 September 2006). Territorial Disputes and Resource Management: A Global Handbook. Nova Publishers. p. 199. ISBN 978-1-60021-445-5. Retrieved 30 April 2012.