Isaac Roberts Hawkins (May 16, 1818 – August 12, 1880) was an American soldier, politician and a member of the United States House of Representatives for Tennessee's 7th congressional district.

Nancy was the daughter of Gen. Isaac Roberts and his wife Mary "Polly" Johnston Roberts and was the maternal granddaughter of Ann Robertson Johnston Cockrill, an early pioneer who was sister to James Robertson, a founder of Ft Nashborough (later Nashville).

A staunch Unionist, he was a delegate from Tennessee to a peace conference held in Washington, D.C., in 1861 in an effort to devise a means to prevent the impending war.

He was exchanged in August 1864 and resumed active service, being in command of the Cavalry force in western Kentucky until the close of the Civil War.

He was commissioned by Governor William Gannaway Brownlow as one of the chancellors of Tennessee in 1865 but declined to qualify.