Rosser – a product of the Dragons Academy – finished as top try scorer at Dragons last season, grabbing five tries in just 11 games.
The 24-year-old added to an already excellent try scoring record for the region where he now has an impressive 25 tries in 65 games – moving into fifth place in the all-time list.
Dean Ryan, Director of Dragons Rugby, said: “We’re pleased that Jared becomes the latest talented homegrown player to remain at his region.
“Jared brings a real attacking strike threat to our game and is eager to keep developing and bring even more to his game as we move forward.”
A former Wales Under-20 and Sevens international, Rosser – who has also operated at centre – is now looking to bring his undoubted firepower to the 2022/23 season.
“I’m really proud to have extended my stay with my region,” said Rosser.
“I truly love turning up to work with a great bunch of boys I’ve grown so close to over the years.
“I’m now looking forward to the challenge that next season brings and hopefully I can bring something to the party.”
