Vermont, Connecticut, New Hampshire and Rhode Island, whose general assembly this year considered a bill that would recognize gay marriages performed out of state, all have divorce rates below the national average. Iowa, which became the first Midwest state to legalize same-gender marriages, has a divorce rate of 2.7 per 1,000, again below the national average.
Using these numbers, one can conclude that lower divorce rates in states that accept same-sex marriage demonstrate the strongest family structures.
But is the opposite true? What about states that deny marriage rights to gay and lesbian couples? Again, no.
Across the United States, states that have codified laws or constitutional amendments to deny marriage rights to same-gender couples and their children have higher divorce rates than the states where marriage equality has become law.
Source: http://morningsentinel.mainetoday.com/view/columns/6960987.html