He died as a result of wounds sustained from enemy fire whilst on a reassurance patrol near Sangin in northern Helmand on Monday 23 February.
He received immediate medical attention both on the ground and at the ISAF medical facility at Kandahar Airfield, prior to being returned to the UK for further specialist treatment.
Spokesperson for Task Force Helmand, Commander Paula Rowe, said
"The death of this brave Marine is a tragedy and his loss will be felt deeply by his family, friends and all those who served alongside him. We extend our deepest sympathy, thoughts and prayers to them at this terrible time."
The Royal Marine's next of kin have been informed and have asked for a period of grace before further details are released.