Thomas was second on the team in rushing in 2011 with 361 yards and two touchdowns on 73 carries.
"This decision was based solely on the fact that this is my last year to play and my parents and I felt like it was the right move to make," Thomas said in a statement.
Thomas' move was also made easier based on the fact that Georgia was set to return it's top five rushers from a year ago. Freshmen Keith Marshall and Todd Gurley will also join the backfield.
"Carlton came to me recently to discuss his thoughts," coach Mark Richt said. "I understand his decision and appreciate all the contributions he's made to our program."
A native of Frostproof, Fla., Thomas played in 27 career games, including two starts. He rushed for 725 yards and four touchdowns on 159 career carries.
"I connected with the University of Georgia during my time in Athens on a personal level and will never forget the relationships I developed and the life lessons I learned," Thomas said. "I know I will take everything I learned over the last several years and try to spread the knowledge wherever life takes me in the future."