The chart below lists the states in which same-sex couples can enter into committed legal relationships through state-recognized procedures. The range of rights provided is broad. Some states, like Massachusetts, allow full legal marriage for same-sex couples. Some, like California, provide a "marriage equivalent" (such as domestic partnership) with many or all of the rights and benefits of marriage. Other states, like Maine, allow gay and lesbian couples to register in relationships that provide some benefits (though far fewer than those enjoyed by married couples).

To find out the details of the same-sex relationship laws in your state, see Nolo's article Same-Sex Marriage: Developments in the Law.

*States that have passed a defense of marriage act (DOMA) or a constitutional amendment have effectively limited legal marriage to couples of the opposite sex. In order for same-sex marriage to become possible in these states, their DOMA laws must be overturned or their constitutions amended.

For a comprehensive breakdown of the complex and ever-changing rules of same-sex relationship laws, a review of all the issues that influence the decision to marry, and practical guidance on one of the most important decisions a couple can make, get Making It Legal: A Guide to Same-Sex Marriage, Domestic Partnership & Civil Unions, by Frederick Hertz with Emily Doskow (Nolo).