Masarautar Agbon (kuma Agbon ẹkwuotutu) yana ɗayan daga cikin rukunoni ashirin da huɗu na mutanen Urhobo waɗanda suka kasance tun kafin haɓakar Daular Benin a cikin shekarun 1440 da kuma kafin zuwan Turawan Portugal a Yammacin Neja Delta a cikin 1480s. Tana cikin ƙaramar hukumar Ethiope ta Gabas A jihar Delta, Najeriya. Wacce ta mamaye babban fili mai fadin kilomita murabba'in 375. Wannan masarautar tana kewaye da sauran al'ummomin Urhobo a cikin yankin. Gidan sarautar gargajiya na wannan masarautar yana Isiokolo . Al'adar baka tana magana game da ƙaura daga tsohuwar Daular Benin ta hanyar Urhobos wanda ya haifar da wannan yanki. Waɗanda suka kafa Agbon sun yi ƙaura ta cikin Kwale, wataƙila daga Erhowa, suka zauna a Ehwen da Erhivwi ko Irri a cikin yankin Isoko na Jihar Delta a yanzu. Daga can suka sauka zuwa Utokori, kusa da Ughwerun; sannan zuwa Olomu kuma ta yankin Ughelli na yanzu na Ekuigbo ya sami Otorho r 'Agbon wanda yanzu ake kira Isiokolo . Isiokolo yanzu ya zama sanannen wuri na shugabanci ta membobin wannan masarautar. Masarautar Agbon ta kai kimanin murabba'in kilomita 375.