How many mythologies exist in history is a very interesting question but one that is almost impossible to answer. Also, how would you count them? Would each god and goddess be counted individually? Regardless, throughout history, mythologies have existed in virtually every culture and area of the world. The earliest mythologies that we are aware of begin in the Middle East and South Asia with Gilgamesh, The Babylonian Creation Story, Horus, Osiris, Ra and Pharaohs in ancient Egypt.
There are also The Bhagavad Gita, Buddha, One Thousand and One Nights, and more. The Greek Titans and Titanesses came before the Greek and Roman gods and goddesses. There were also Dagda’s Harp and other Celtic myths, Norse myths involving Odin, Thor, hammers, rings and other Norse magic. This covers just Europe and the Middle East. There are also myths in the Americas, Africa, and Asia Pacific regions of the world.