According to a report from Brown University, Mexicans - making up about 60 percent of the country's Latino population and a clear majority throughout the Southwest - are so numerous that they drown out other Hispanic groups in many studies.
New arrivals typically continue moving into immigrant-heavy neighborhoods, which, according to the report, ends up "creating isolated communities even as many Mexicans move to other parts of the nation."
That trend wasn't that surprising. But it stood out when compared to other ethnic groups, who are becoming less segregated.
"We thought Hispanic segregation stayed the same because we couldn't see the rest of the picture," said Brown University sociologist John Logan, co-author of the report, according to USA Today
The Brown University study, entitled "Hispanics in the United States: Not Only Mexicans," also showed that Latino immigrants from smaller countries in Latin America are making gains in terms of population growth at a rapid pace.
In 1990, there were only three Latino groups with over a million members: Mexicans, Puerto Ricans and Cubans. The 2010 Census shows three more groups -- Dominicans, Guatemalans, and Salvadorans -- all joined the million-member club, while several other Latin American nationals surpassed more than half a million.
Still, growth in population hasn't necessarily turned into widespread economic advancement.
On average, Mexican immigrants make about $20,200 compared with Cubans, Venezuelans and Argentineans, who average around $30,000. Only Hispanics from Central America -- one of the poorest regions of the world -- make about as much as Mexicans.