John Spencer Sharp is an American Democratic politician from Texas, who has served since 2011 as the chancellor of the Texas A&M University System. From 1991 to 1999, he was the Texas Comptroller of Public Accounts. From 1979 to 1987, he was a member of both houses of the Texas State Legislature. From 1987 to 1991, he was a commissioner of the Railroad Commission of Texas. In 1998 and 2002, he was the Democratic Party's nominee for Lieutenant Governor of Texas.

The Texas A&M University System is a state university system in Texas and is one of the state's seven independent university systems.