Reformed Theological Seminary (RTS) is a theological seminary in the Reformed theological tradition with campuses in multiple locations in the United States. Founded by conservatives in the Southern Presbyterian Church, the Presbyterian Church in the United States, in 1966, it serves primarily students from more conservative branches of the Presbyterian and Reformed traditions.

In 1966, conservatives from the Southern Presbyterian Church, the Presbyterian Church in the United States (PCUS), concerned about the increasing influence of liberalism and neo-orthodoxy in the denomination's seminaries and pulpits, established Reformed Theological Seminary, independent from the PCUS, along "Old School" Presbyterian lines, to educate ministers.^[2] RTS has largely served the Presbyterian Church in America since that denomination's founding in 1973, then later the Evangelical Presbyterian Church and the Associate Reformed Presbyterian Church and in more recent years serves a large population of students from Particular Baptist and independent churches.

RTS is governed by a board of trustees exercising oversight through its administration. RTS is led by its executive committee, the chancellor of the RTS system and through the respective campus presidents.^[3] Ligon Duncan is Chancellor and CEO.^[4]

RTS follows the Reformed tradition, including Covenant Theology.^[5]

RTS has campus locations in Jackson, Mississippi; Orlando, Florida; Charlotte, North Carolina; Atlanta, Georgia; Washington, D.C.; as well as its Global Campus.^[13] RTS also has sites in New York City, as well as Dallas and Houston in Texas.^[14]

RTS's Washington, D.C. campus is a member of the Washington Theological Consortium.^[15]

RTS's global campus traces its origins to the Orlando campus, from which distance education was first offered for RTS students in the early 1990s.^[16] In 1998, the Global campus became a separate "campus".^[16] The global campus eventually became the first online seminary to offer accredited degrees.