Our only means of dating a peoples mythology is from samples of their writing, which came a long time after the invention of their mythology. So following this criteria the distinction would go to the Sumerians and perhaps the Egyptians. But all people have mythology that extends further back than this time -- and we have no way of measuring that.
the earliest works of history also incorporated mythology
the earliest works of history also incorporated mythology
The earliest works of history also incorporated mythology
The earliest works of history also incorporated mythology
The earliest works of history also incorporated mythology
The earliest works of history also incorporated mythology
The earliest works of history also incorporated mythology
Beowolf is the oldest fantasy story I'm aware of that isn't necessarily part of a countries mythology.
The Earliest known people were Ciboney
"what was California's climate like when the earliest people lived there?"
The earliest known people in the Caribbean are the Taino indians
The earliest works of history also incorporated mythology