Simpson-Daniel has been with the club for 14 seasons and was on the brink of breaking the club's all-time appearance record before being hit by a serious ankle injury in November. The 31-year-old, who was an Amlin Challenge Cup winner with Gloucester in 2006, is out of action for between four to six months but his form prior to injury suggests he still has a big role to play next term.
Sharples is another of Gloucester's most-dangerous attacking weapons, boasting a record of 47 tries in 108 appearances since progressing through the club's academy system, including one in the Heineken Cup defeat at Munster in October.
Hooker Dawidiuk is now in his fifth season with the club and has 80 appearances to his name; prop Knight is a former England U20 cap; and second row Stooke has made a huge impression in his first season with the senior side having won the Junior World Cup with England in the summer.
"I'm delighted that all five of them have committed their futures to Gloucester Rugby. Charlie, Darren, James and Shaun have been a big part of the club's success in recent years and Elliott has a huge future in front of him," said director of rugby Nigel Davies.
"It's been a busy couple of months for us on top of the re-signings announced before Christmas and the arrivals next season of John Afoa and Richard Hibbard.
"The players can see where the club is heading, and are excited to be a part of that going forward. Their commitment speaks volumes.
"And, once again, it's a testimony to the hard work and commitment of everyone at the club. We're able to invest significantly in our team thanks to the backing of our board, the continued financial success of Gloucester Rugby and the significant investment made by our partners, sponsors and supporters."
The summer arrival of Wales and British & Irish Lions hooker Hibbard and All Black prop Afoa is a huge boost to Gloucester, as was the re-signing of the likes of Billy Twelvetrees and Henry Trinder, but uncertainty still surrounds the future of star fly-half Freddie Burns. Burns has been heavily linked with a switch to fellow English outfit Leicester Tigers and has been left of Gloucester's starting line up in recent weeks.