Radford, 31, will enter the fifth year of his second spell at the club having initially started his career with the Airlie Birds in 1997.
He said: “Obviously I am delighted to have secured my future with Hull FC. I have really enjoyed my rugby this year and when you look at the additions we have made to this year’s squad and Richard’s plans for the future it really excites me and I want to be part of that squad, challenging for honours.”
Radford, who has scored 17 tries in 161 appearances for Hull and led them out as captain in the 2008 Challenge Cup final, will coach Hull’s Under 15s side as part of his new contract.
Head Coach Richard Agar said: “Lee Radford is a loyal clubman, he is a player that is consistent and plays lots of minutes for us.
“His experience in leadership is invaluable to the group and I am delighted to have Lee’s influence within our squad.”