No, the Aztecs did not live in the Andes Mountains. Instead, they inhabited a region known as Mesoamerica, which primarily includes present-day Mexico. The Aztec civilization was centered around the Valley of Mexico, with Tenochtitlán, their capital, located on an island in Lake Texcoco.
The Andes Mountains, on the other hand, are a major mountain range that stretches along the western coast of South America, primarily passing through countries like Peru, Bolivia, Ecuador, and Colombia. The civilizations that thrived in the Andes included the Incas and various other cultures, but they were distinct from the Aztecs.
In summary, while both the Aztecs and the civilizations of the Andes were significant ancient cultures in South America and Mesoamerica, they were located in different geographical regions and were culturally different.