State (pop., 2000: 13,096,686), central Mexico.
It covers 8,245 sq mi (21,355 sq mi), and its capital is Toluca . Almost completely surrounding the Federal District and Mexico City , it contains many preconquest ruins, including Tenayuca, Malinalco, and Teotihuacán . The average elevation exceeds 10,000 ft (3,000 m), which creates a cool climate. The population density is the highest of any Mexican state. The economy is based on agriculture and manufacturing.