The American Civil Liberties Union, the ACLU of Oregon, and volunteer counsel from the law firms of Johnson, Johnson & Schaller, PC and Perkins Coie, LLP in December 2013 filed a federal lawsuit in U.S. District Court in Eugene on behalf of two same-sex couples who wished to marry in Oregon – Paul Rummell and Ben West, and Lisa Chickadonz and Christine Tanner – and Basic Rights Education Fund.

The American Civil Liberties Union, the ACLU of North Carolina Legal Foundation and the law firms of Sullivan & Cromwell LLP and Ellis & Winters LLP have filed a new case in federal court on behalf of three married, same-sex couples seeking state recognition of their marriages. Because of the serious medical condition of one member of each couple, they are asking the court to take swift action.

The American Civil Liberties Union of Pennsylvania, the American Civil Liberties Union, and volunteer counsel from the law firm of Hangley Aronchick Segal Pudlin & Schiller have filed a federal lawsuit on behalf of 21 Pennsylvanians who wish to marry in Pennsylvania or want the Commonwealth to recognize their out-of-state marriages. The lawsuit alleges that Pennsylvania's Defense of Marriage Act and refusal to marry lesbian and gay couples or recognize their out-of-state marriages violates the fundamental right to marry as well as the Equal Protection Clause of the Fourteenth Amendment.

On behalf of nine Illinois couples seeking recognition for their shared love and commitment, the American Civil Liberties Union and the ACLU of Illinois have filed a lawsuit to challenge the constitutionality of Illinois' law that denies gay and lesbian couples the freedom to marry. Currently, Illinois law excludes gay and lesbian couples from the recognition and protections that come with the universally recognized relationship status of marriage, and limits them instead to a separate civil union status.

Six same-sex couples, represented by the ACLU, the ACLU of New Mexico, the National Center for Lesbian Rights (NCLR) and Albuquerque law firm Sutin, Thayer & Browne, APC, filed a lawsuit against the State of New Mexico and the Santa Fe and Bernalillo County Clerks seeking the freedom to marry. The lawsuit argues that the New Mexico marriage statutes and the New Mexico Constitution do not bar same-sex couples from marrying, and that the New Mexico Constitution requires the state to allow same-sex couples the freedom to marry.