How much of Mexico are cities?
In terms of urbanization, almost 80% of the population lives in urban areas.
In or around the cities of Mexico City (19.2 million), Guadalajara (4.09 million) and Monterrey (3.6 million) which account for almost 25% of the total population of Mexico. If you mean type of residence, most live in single family homes, much like in the US. However, in big cities like Mexico or Monterrey, many live on multi-family apartment buildings and condos.
On rivers or on the coast. Historically it was much easier to trade with cities in easy reach of water, so cities that were had an advantage. Of the five most populous cities in the world at the moment only one, Mexico City, is not on a navigable river or on the coast. Tokyo, coastal Seoul, Han river Mexico City New York City, Hudson river and coastal Mumbai, Ulhas river and coast
New Mexico is a US state. Its capital is Santa Fe, and another two important cities of such state include Albuquerque and Las Cruces. Mexico on the other hand, is an independent country south of the United States. Its capital is Mexico City, and two other major cities of such country are Guadalajara and Monterrey.