In some states, a domestic partnership is a legally recognized relationship between members of a same-sex couple, with rights similar to those of a marriage relationship.
As of my knowledge cutoff in early 2023, Idaho does not legally recognize domestic partnerships. Idaho law defines marriage as a union between one man and one woman, and the state does not offer a legal status similar to marriage for same-sex couples or any couples outside of marriage. This means that in Idaho, domestic partnerships do not provide legal rights akin to those of marriage, such as property rights, inheritance rights, or the ability to make medical decisions for a partner. Same-sex couples in Idaho can marry following the U.S. Supreme Court's 2015 decision in Obergefell v. Hodges, which legalized same-sex marriage nationwide, but there is no alternative legal recognition for relationships outside of marriage in the state.