Toluca, officially Toluca de Lerdo, is the state capital of the State of Mexico as well as the seat of the Municipality of Toluca. Toluca has a population of 910,608 as of the 2020 census. The city forms the core of the Greater Toluca metropolitan area, which with a combined population of 2,347,692 forms the fifth most populous metropolitan area in the country. Located 63 kilometres (39 mi) southwest of Mexico City, the city's rapid growth stems largely from its proximity to the capital.

The State of Mexico, officially just Mexico, is one of the 32 federal entities of the United Mexican States. Commonly known as Edomex to distinguish it from the name of the whole country, it is the most populous, as well as the most densely populated, state in the country.