A: As of 2014, the source of the Amazon River is the Mantaro River in the Peruvian Andes. The source of the Amazon River has always been hotly debated, and until 1971, the Apurimac River was considered the source of the Amazon. read more
Throughout the 1700s, the Marañón River in northern Peru held the distinction of being the Amazon's source, says Andrew Johnston, a geographer with the Smithsonian's National Air and Space Museum in Washington, D.C. read more