The American migration to Mexico is a growing phenomenon today due to a series of pull factors such as warm weather, relaxed lifestyle and economic benefits they find in Mexico. These factors combined with the relatively early retirement age, improved health and economic support systems, motivate to a large part of the population in the United States to make the decision to change his residence to the south. There are solid communities of Americans in the Chapala-Ajijic corridor, as well as Guanajuato-San Miguel de Allende, Puerto Vallarta-Nuevo Vallarta, San Jose del Cabo-Cabo San Lucas. Other destinations are Rosarito and Ensenada in Baja California, San Carlos and Puerto Penasco in Sonora and Mazatlán, Sinaloa. In this book the author to analyze this phenomenon in the localities of Los Cabos in the state of Baja California Sur and Mazatlan, Sinaloa. Particularly the objective is to know the perception and integration between this American community and the local people.