Agonglo was a King of the Kingdom of Dahomey, in present-day Benin, from 1789 until 1797. Agonglo took over from his father King Kpengla in 1789 and inherited many of the economic problems that developed during Kpengla's reign. Because of the poor economy, Agonglo was often constrained by domestic opposition. As a response, he reformed many of the economic policies and did military expeditions to try to increase the supply for the Atlantic slave trade. Many of these efforts were unsuccessful and European traders became less active in the ports of the kingdom. As a final effort, Agonglo accepted two Portuguese Catholic missionaries which resulted in a large outcry in royal circles and resulted in his assassination on May 1, 1797. Adandozan, his second oldest son, was named the new king.

The King of Dahomey was the ruler of Dahomey, an African kingdom in the southern part of present-day Benin, which lasted from 1600 until 1900 when the French Third Republic abolished the political authority of the Kingdom. The rulers served a prominent position in Fon ancestor worship leading the Annual Customs and this important position caused the French to bring back the exiled king of Dahomey for ceremonial purposes in 1910. Since 2000, there have been rival claimants as king and there has so far been no political solution. The Palace and seat of government were in the town of Abomey. Early historiography of the King of Dahomey presented them as absolute rulers who formally owned all property and people of the kingdom. However, recent histories have emphasized that there was significant political contestation limiting the power of the king and that there was a female ruler of Dahomey, Hangbe, who was largely written out of early histories.