Popular figures Andrew Grant-Soulsby has not re-signed, due to moving away from the area, while Erno Bostyan has left the club.
The short loan deals of Shahban Mohammed, Luke Ridley and Jackson Ward have ended.
Manager Chris Swailes paid tribute to Grant-Soulsby on the club’s website: "In our League winning season Kegs was one of our best players and ran a close second for Player of the Season.
"Kegs has all the things you want in a player; he's a leader, a great organiser on the pitch, reliable and dependable.
"Off the pitch he was excellent and was well liked and respected by everybody at the club, we wish him all the best for the future.”
Retained list: Karl Dryden, Craig Scott, Michael Hall, Dan Capewell, Dan Halliday, Liam Marrs, Callum Elliott, Jack Elliott, Liam Thear, Ursene Mouanda, Jake Stafford, Michael Pearson, Luke Page, Mark Fitzpatrick, Liam Brooks, Scott Heslop