Detroit
Detroit’s total population has plunged by 25 percent over the last decade. The city lost 185,393 Black residents during that time period. After decades of “white flight,” African-Americans, who made up at one point 83 percent of the population, are now leaving Detroit at a higher rate than their white neighbors, according to estimates released by the U.S. Census Bureau.
San Francisco
In 1970, there were 744, 000 Black people in San Francisco. According to census estimates, the number has dwindled to about 47,000 by 2005. That’s a decline from 13.4 percent of the population to just 6.5 percent — the biggest percentage decline in any major American city.

