Like other neighborhoods in New York City, the South Bronx has no official boundaries. The name has been used to represent poverty in the Bronx and applied to progressively more northern places so that by the 2000s Fordham Road was often used as a northern limit. The Bronx River more consistently forms an eastern boundary. The South Bronx has many high-density apartment buildings, low income public housing complexes, and multi-unit homes. The South Bronx is home to the Bronx County Courthouse, Borough Hall, and other government buildings, as well as Yankee Stadium. The Cross Bronx Expressway bisects it, east to west. The South Bronx has some of the poorest neighborhoods in the country, as well as very high crime areas.

Why has the supposed size of the 'South Bronx' grown?