 Residential segregation is a phenomenon characterizing many stateside Puerto Rican population concentrations.While blacks are the most residentially segregated group in the United States, a 2002 study shows that stateside Puerto Ricans are the most segregated among US Latinos.Stateside Puerto Ricans are disproportionately clustered in what has been called the "Boston-New York-Philadelphia-Washington Corridor" and in Florida along the East Coast.