answer:
The U.S. Department of Housing and Urban Development (HUD) provides local-level (including county) data files on foreclosures at this link: http://www.huduser.org/portal/datasets/nsp_foreclosure_data.html
You may also want to look at some of the foreclosure data resources (many with mapping options) listed at the Federal Reserve Bank of Atlanta's website: http://www.frbatlanta.org/commdev/foreclosure-related_data_sources.cfm
