County-to-County Record Layouts - Required for .dat Files 2010-2011DOC 2009-2010DOC 2008-2009DOC 2007-2008DOC 2006-2007DOC 2005-2006 2004-2005 U.S. Population Migration Data: Strengths and LimitationsDOC Return to Migration Data Downloads Return to County to County Migration Database Files Return to State to State Migration Database Files
