Newport-born Roberts has put pen to paper on fresh terms to extend his successful stay at Rodney Parade.
The powerhouse centre, capped 94 times by Wales and a key figure the 2009 and 2013 British & Irish Lions tours, returned to Wales in August last year and has been in outstanding form for Dragons.
The 34-year-old has made 13 appearances in all competitions, scoring four tries, while utilising his vast experience to help mentor the exciting next generation of talent coming through at the region.
Dean Ryan, Director of Dragons Rugby, said: “We’re delighted Jamie is going to be around for another year and that he can continue to make a big impact in our environment.
“His form this season has been outstanding and he has been a catalyst for others to raise their game around him.
“His experience has also been invaluable in stabilising younger players in our squad and they can now continue to benefit from working closely with him.”
Roberts – who has previously featured for Cardiff Blues, Racing 92, Harlequins and Bath during a glittering career – has spoken of his delight in agreeing new terms.
Roberts said: “The season has felt quite disjointed, but I strongly believe we’re on an upward trajectory.
“The growth within the playing group has been evident and I’ve enjoyed sharing ideas and working under the current coaching group and Dean’s leadership.
“As we continue to grow our identity and strive to improve and become even more competitive, I’m delighted to be able to play my part for another season.
“My remit when I joined was not only to help develop and accelerate the growth of many of our younger players, but more importantly to contribute the best version of myself on the playing field.
“The nature of our environment has meant I’m enjoying my rugby and the enthusiasm of the group has certainly rubbed off and continues to drive my energy and love for playing.
“I feel as competitive as ever and certainly feel my body is in a good place to survive the impact of top-flight rugby for another season.
“I look forward to the day crowds can return to Rodney Parade once more and certainly for my family and newest family member to enjoy the incomparable buzz of matchday.”