Rental vacancy rate: 16.9%
Homeowner vacancy rate: 1.7%
Detroit was one of the hardest hit cities in the recession, and with an unemployment rate of 9.9 percent as of May, it's little wonder that its 16.9 percent rental vacancy rate is the second highest in the country. Surprisingly, though, the homeowner vacancy rate remains below the 75 largest metro area's average of 2.18 percent. According to the Census Bureau, at the end of 2011, Detroit had a gross vacancy rate of 12.2 percent, a level the city has virtually maintained since 2006.