These rankings were determined in the first quarter of 2010. They are
are based on the popularity of websites as measured by four major
ranking companies, and is explained in an article published in the Digital Genealogist,
edited by Elizabeth Kelley Kerstens. The 2009 and 2008 rankings are
given, in that order, in parenthesis after the website description.
Sites new to the list for 2010 are so identified.