Robert Gadsden McCaw (December 28, 1821 – November 24, 1870) was an American politician and slaveholder.

A member of the Democratic Party, he served as the 51st Lieutenant Governor of South Carolina.

[1][2] McCaw studied at the University of Virginia in Charlottesville before later holding approximately 135 slaves in York County, South Carolina.

[1][4] In 1864, McCaw was elected lieutenant governor, and he held the office until May 1865.

After the Confederacy's defeat in the Civil War, South Carolina's governor, Andrew Gordon Magrath, was arrested and removed from office.