1. Stockton, Calif.
  2. Las Vegas, Nev.
  3. Riverside, Calif.
  4. Bakersfield, Calif.
  5. Fort Lauderdale, Fla.
  6. Phoenix, Ariz.
  7. Sacramento, Calif.
  8. Orlando, Fla.
  9. Fresno, Calif.
  10. Oakland, Calif.

Source: RealtyTrac U.S. Foreclosure Market Report