The world's earliest river valley civilizations were predominantly located around the following rivers:
- Nile River (Africa) - Home to ancient Egyptian civilization.
- Tigris and Euphrates Rivers (Western Asia) - Associated with the Sumerians, Akkadians, Babylonians, and Assyrians in ancient Mesopotamia.
- Indus River (Asia) - Center of the Indus Valley Civilization, also known as Harappan Civilization.
- Huang He (Yellow River) (Asia) - Associated with ancient Chinese civilizations.
These locations were crucial for the development of agriculture, trade, and early urban societies. The other rivers listed (Amazon, Mississippi, and Volga) were not centers of the earliest river valley civilizations.