Many people know that domestic partnerships are similar to marriage and can apply to unmarried couples who are living together. Most registered domestic partners tended to be in same-sex relationships prior to the Supreme Court's 2015 Obergefell v. Hodges decision, especially if they lived in a state that banned same-sex marriage. But it remains an option in a few states for partners (same- or opposite-sex) who live together and share a common domestic life. However, some states and cities that offer the arrangement require one of the individuals to be at least 62-years-old.
A domestic partnership is not identical to marriage, but it provides some of the same benefits. Some states refer to the institution as a "civil union," but the definition of what is a domestic partnership or civil union vary from one city or state to the next. The following is a general overview of domestic partnerships, focusing on registration and benefits.