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, South Carolina does not legally recognize domestic partnerships. The state does not offer a registry for domestic partnerships nor does it provide state-level legal rights similar to those of marriage for same-sex or opposite-sex couples in domestic partnerships. Same-sex marriage became legal in South Carolina following the federal Supreme Court decision in Obergefell v. Hodges in 2015, which required all states to license and recognize marriages between same-sex couples. Therefore, same-sex couples in South Carolina seeking legal recognition of their relationship are able to marry and obtain the same state and federal benefits as opposite-sex married couples.