Jones, who rushed for 575 yards and one touchdown before losing the starting job to DeMarco Murray in 2011, underwent shoulder surgery the day after the season ended.
Jones missed all of Dallas' offseason workouts while recovering from the procedure.
The Cowboys open training camp Wednesday for quarterbacks, rookies and injured players in Irving, Texas. Jones, however, will be available to practice with the full squad July 30 in Oxnard, Calif.
Jones, a former first-round pick in 2008 out of Arkansas, has missed a total of 16 games in his career. He's had only one season, 2010, where he played in all 16 games, during which he rushed for a career-high 800 yards on 185 carries.
Jones' return also gives the Cowboys a healthy backfield to start training camp.
Murray missed the last three games of the 2011 season after suffering a fractured ankle Dec. 11 against the New York Giants. Murray, who led the team with 897 yards in his rookie season, didn't miss any offseason workouts and was cleared to practice several weeks ago.