How many US states have legalized same-sex civil unions?

Answer 1

These US states had legalized same-sex marriage by the end of 2009:

1. Massachusetts, USA (May 17, 2004);
2. California, USA (if performed between June 16 and November 5, 2008);
3. Connecticut, USA (November 12, 2008);
4. Iowa, USA (April 3, 2009); and,
5. Vermont, USA (September 1, 2009).

[Washington, DC, USA legalized same-sex marriage on December 18, 2009.]

Answer 2

1. Massachusetts (May 17, 2004);
2. California (if performed between June 16 and November 5, 2008);
3. Connecticut (November 12, 2008);
4. Iowa (April 3, 2009);
5. Vermont (September 1, 2009); and,
6. Washington, DC (December 18, 2009).

Answer 3

States where civil unions can be legally performed (in chronological order):

1. New Jersey (February 19, 2007);
2. Illinois (June 1, 2011);
3. Rhode Island (July 1, 2011);
4. Delaware (January 1, 2012); and,
5. Hawaii (January 1, 2012).