Atheists have the lowest divorce rate when compared to religious groups (except Catholics and Lutherans, with whom they are tied). This is according to a Christian polling company (which confusingly refers to evangelicals as "non-denominational").
MORE: http://www.care2.com/causes/atheists-have-stronger-family-values-than-evangelical-christians.html#ixzz2e7rdYz8F
See also...
Atheist Morality vs. Religious Morality: Which Is Superior?
http://americanhumanist.org/news/details/2013-09-atheist-morality-vs-religious-morality-which-is-supe
