- Massachusetts (#6) - May 17, 2004
- Connecticut (#5) - Nov 12, 2008
- Iowa (#29) - Apr 24, 2009
- Vermont (#14) - Sep 1, 2009
- Maine (#23) - Sep 14, 2009
- New Hampshire (#9) - Jan 1, 2010
The Flag of Equal Marriage: Jan 1, 2010 (via tashian)
More info at MakeitEqual.org