Emptiest U.S. cities

According to "America's emptiest cities, 2012" from CNBC:

Each quarter, the Census Bureau publishes data on homeowner and rental vacancies in the 75 largest cities. Listed here are the [ten] cities with the most vacancies, using a weighted ranking of both rental and homeowner vacancies based on a 12-month average of both kinds of vacancy rates to smooth out sampling errors. Weights are assigned to rental and homeowner vacancies according to the national proportion of homes to rental properties in the U.S. Our list reveals the most significant outliers in both categories relative to other major U.S. cities.

1.  Orlando
2.  Dayton, Ohio
3.  Memphis
4.  Detroit
5.  Richmond, Virginia
6.  Las Vegas
7.  Atlanta
8.  Houston
9.  Tampa
10. Toledo

Image of vacant properties in the Church Hill neighborhood of Richmond, from Church Hill People's News blog.