Right now. Current population (Aug 2013) is of approximately 117.1 million and growing.
It depends on what "Southern Mexico" means to you. The most commonly associated states to such region are the states of Guerrero, Oaxaca and Chiapas:Guerrero: 3,388,768Oaxaca: 3,801,962Chiapas: 4,796,580Total population for southern Mexico (according to the 2010 census) equals 11,987,310 people.
To the United states of Mexico.
Mexico City, with a population of 19,231,829.
mexico
In 1940, the population of Mexico was 19.8 million people. By the year 2000, the population had reached 100 million people.
On the contrary; most Native American population resides on the southern states of Mexico.
Not even close.
santafe
Mexico has 77% of its population living in urban areas, at a rate of urbanization of 1.5% per year. This means in 15 years or less most Mexicans will be living in cities.
It is estimated at 98.514 million during that year.
111,211,789 (July 2009 est.)
Roman Catholicism is the most followed religion in Mexico, by approximately 88% of its population.