As of the census of 2000, there were 5,420 people living in the neighborhood. The racial makeup of Union Square was 30.2% White, 63.4% African American, 0.0% Native American, 3.0% Asian, 1.1% from other races, and 2.3% from two or more races. Hispanic or Latino of any race were 1.1% of the population. 38.0% of occupied housing units were owner-occupied. 34.9% of housing units were vacant.
