Tultitlán de Mariano Escobedo is the fourth largest town in and municipal seat of the municipality of Tultitlán located in the northeastern part of the State of México in Mexico. It lies adjacent to the northern tip of the Federal District and is part of the Greater Mexico City urban area. Both the city and the municipality are interchangeably known as San Antonio Tultitlán or simply Tultitlán, a name which comes from Náhuatl meaning "among the tule plants". "de Mariano Escobedo" was added to the city's name in 1902 in honor of the general who fought in the Mexican–American War and for the liberals during the period of La Reforma with Benito Juárez.

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.