Found a site that has some interesting resources. Formerly known as the Alternatives to Marriage Project, it is now known as Unmarried Equality.
From their Statistics page:
Public Opinion
In a 1995 Harris poll, 90% of people believed society “should value all types of families.” – Stephanie Coontz. 1997. The Way We Really Are: Coming to Terms With America’s Changing Families.
43% of Americans in their twenties believe that cohabiting couples should receive the same benefits as married couples. – Gallup. 2001.
45% of Americans in their twenties believe that government should not be involved in licensing marriage. – Gallup. 2001.
55% of Americans approve of men and women living together without being married. – Gallup. 2007.
57% of Americans consider an unmarried couple who have lived together for five years just as committed in their relationship as a married couple who have lived together for the same time. -Gallup. 2008.
The majority of Americans aged 18-64 consider living in unmarried households as having either no effect or a positive effect on children. – Gallup. 2008.
From their Statistics page:
Public Opinion
In a 1995 Harris poll, 90% of people believed society “should value all types of families.” – Stephanie Coontz. 1997. The Way We Really Are: Coming to Terms With America’s Changing Families.
43% of Americans in their twenties believe that cohabiting couples should receive the same benefits as married couples. – Gallup. 2001.
45% of Americans in their twenties believe that government should not be involved in licensing marriage. – Gallup. 2001.
55% of Americans approve of men and women living together without being married. – Gallup. 2007.
57% of Americans consider an unmarried couple who have lived together for five years just as committed in their relationship as a married couple who have lived together for the same time. -Gallup. 2008.
The majority of Americans aged 18-64 consider living in unmarried households as having either no effect or a positive effect on children. – Gallup. 2008.