Ciudad Nezahualcóyotl (aka Ciudad Neza) is a city and seat of the municipality of Mexico State adjacent to the northeast corner of Mexico's Federal District: it is thus part of the Mexico City Metropolitan Area. It was named after Nezahualcoyotl, the Acolhua poet and king of nearby Texcoco, and was built on the drained bed of Lake Texcoco. The name Nezahualcóyotl comes from Nahuatl and it means "fasting coyote" Ciudad Neza is nearly co-extensive with the municipality making the names interchangeable.
Ciudad Neza has a population of 1,136,300, which is 99.6% of the municipal population of 1,140,528, according to the INEGI 2005 census. It is the second most populous municipality in the state of México, just below Ecatepec, and the eighth largest in the country. It lies at 2,220 meters above sea level. It is also considered among the most dangerous places in Mexico, due to the rampant crime in the area.
The city is built on the lakebed of what was Lake Texcoco. Although operations to drain this lake, among a number of others, was begun shortly after the Conquest by the Spanish (to protect Mexico City from floods), it was not achieved until almost 300 years later when finally on March 17,1900 it was proclaimed a success by President Porfirio Díaz.In 1945 the Xochiaca dam and the Tequixquiac tunnel were built, allowing for the first communities to be built in the area. Between 1956 and 1961, the number and size of communities had grown, including the community called "Nezahualcóyotl". In 1963, Nezahualcóyotl became the governing head of its own municipality.
The municipality has an area of 63.44 km² (24.49 sq mi), 81% of which is Ciudad Neza. It borders Ecatepec de Morelos, the Federal Reserve of Lake Texcoco, Gustavo A. Madero, D.F., Venustiano Carranza, D.F. La Paz, Chimalhuacán, Atenco, Iztapalapa and Iztacalco of Mexico City.