| Type: | Yoruba |
| Other Names: | Aganju |
| Member Of: | Orisha |
| Venerated In: | Yoruba religion, Umbanda, Candomble, Santeria, Haitian Vodou, Folk Catholicism |
| Deity Of: | Volcanoes (Cuba / Santería), Wilderness, Desert (Cuba / Santería), River (Cuba / Santería) |
| Region: | Nigeria, Benin, Brazil |
| Ethnic Group: | Yoruba people, Fon people |
| Equivalent1 Type: | Catholic |
| Equivalent1: | Saint Christopher |
| Offspring: | Sango |
Aganju (known as Agayú, Aggayú, Aganjú or Aganyú in Spanish speaking counties) is an Orisha. He is syncretized with Saint Christopher in the Cuban religion known as Santería.
Aganju is strongly associated with Shango. In some traditions Aganju is described as Shango's father; in other traditions he is described as Shango's brother. Both Shango and Aganju were, at one time, rulers of the Oyo empire who became deified.
In the Yoruba areas of Nigeria and Benin Republic, Aganju is known as a deified warrior king from the town of Shaki in the present-day Oyo State of Nigeria. He was said to walk with a sword and is said to fight by shooting fire, as opposed to Sango who fights with thunderstones and lightning. Shaki is in the savannah area of northern Yorubaland that has monoliths and boulder outcroppings.
In Cuba, Aganju is a volcano deity for the practitioners of Santeria/Lucumi religion. But there are no volcanoes in either Cuba nor Yorubaland, nor is Aganju associated with volcanoes among the Yoruba people. However, the Biu Plateau in the highland area of Northeastern Nigeria contains a number of extinct volcanoes. Biu Plateau is about 360order=flipNaNorder=flip from Abuja, the capital of Nigeria and about 450order=flipNaNorder=flip from Oyo, Nigeria. These extinct volcanoes have long been extinct and they are also far from Yorùbáland geographically. It is most likely that the association of Aganjú with volcanoes in Cuba is not older than the last century among creoles. And this is due to Aganjú's supposed temperament coupled with the relationship with Oroíña of Cuban Orisa faith (Ọ̀rànmíyàn in Yorùbá language).
In the Afro-Brazilian tradition of Candomblé, Aganjú is worshiped as a manifestation or quality of the Orisha Shango, often called Xango Aganjú. Aganjú represents all that is explosive and lacking control. He is also nicknamed "Xangô menino" among Candomblé practitioners.