Hispanics tend to gather around major urban centers.  Living in the big cities allows Hispanics to maintain their language and culture because they are in close proximity to other individuals that share similar ethnic characteristics.

Hispanics also tend to group themselves by country of origin.  Most Latinos of Mexican heritage live in the Southwest while Cubans tend to reside in Miami.  Other less known Hispanic pockets are the Salvadorans in Washington DC and the  Hondurans in New Orleans.