Upon the governor’s signature, Illinois will become the second state that is currently offering civil unions to same-sex couples. The status of the various recognition mechanisms is as follows:
Marriage on the same terms as heterosexual marriage – 5.1% of US Population:
District of Columbia
Civil Unions – a rights except the name – 7.1% of US Population:
Domestic Partnerships will all the rights except the name – 16.3% of US Population
Limited recognition of same-sex couples – 6.2% of US Population
Hawaii – Reciprocal Benefits
Colorado – Reciprocal Benefits
Wisconsin – Domestic Partnerships
Maine – Domestic Partnerships
Maryland – Domestic Partnerships
In addition, the states of Maryland and New York (6.4% of US Population) will give full recognition to same-sex marriages conducted where legal. Rhode Island may possibly do so also (it’s a bit uncertain) and offers unregistered Domestic Partnerships with a scant handful of rights.
Also, there are dozens of cities offer some form of recognition and protection for same-sex couples.