Props Chris Coleman, Josh Reynolds and Luke Yendle have have signed contract extensions with Dragons.
Wing Rio Dyer, 22, has also committed his future to the south east Wales region.
Former Wales Under-20s players Coleman, Reynolds and Dyer are, like Yendle, products of the Dragons' academy system.
Tight-head Coleman, 23, and Dyer made their Dragons debut in 2018, a year after Reynolds, also 23.
Tight-head Yendle, 21, who has played for Wales U19s, is on loan at English Championship side Jersey having made his Dragons debut in 2020.
Dragons director of rugby Dean Ryan said: "We're pleased that Chris, Josh and Luke will continue to develop in our environment and look forward to seeing that progress in the comings seasons."
Ryan said Dyer is "undoubtedly an exciting young talent who will keep working hard to earn opportunities".
The region has not specified the duration of the new deals.