James Norwood, Myles Kenlock, Tomas Holy and Tom Carroll are moving on from Portman Road after coming to the end of their contracts.
Nors arrived in Suffolk in June 2019 and scored 28 goals in 88 appearances for the Club across all competitions.
His Town career finished on a high as he found the back of the net three minutes after coming on in the 4-0 win over Charlton on the final day of the season.
Myles, 25, has been on loan at Colchester United since January, and leaves the Club having clocked up 103 appearances.
Tomas has featured 65 times for Town across all competitions and spent the second half of the 2021/22 season on loan at Port Vale.
Tom, who joined the Club last summer on a one-year deal, made a total of 17 appearances for the Blues.
Meanwhile, Bersant Celina, Dominic Thompson, Macauley Bonne and Tyreeq Bakinson have all returned to their parent clubs following the completion of their loan spells at Portman Road.
We would like to place on record our thanks to all players for their efforts.
