The Opal Project is one of 95 volunteer groups from across the UK which have been recognised for their contributions to their local communities this year.
The group was given the award to recognise its work in helping young people to cope with self-harming, to help them understand why they do it, and helping them develop alternative coping strategies.
Launched in 2004 by Magdalen College School(MCS) pupils Laura Sutcliffe and Carrie Smith, the project has been supported by a number of volunteers including Fleur Lewis, Sophie Black and Steven Long.
Laura is now 21 and continues to support the project as a trustee while she prepares to graduate from Aberystwyth University.
She said: "I'm absolutely overjoyed for the project, it is an incredible achievement and it's fantastic for everyone who has volunteered, both in the past and present.
"I am very proud of the project and of all the people who have made it a success and hope I it will continue for many years to come."
The Opal Project is supported by Northants County Council's Dillon's Centre for Young People at MCS.
NCC leader Jim Harker said: "The Opal Project offers a vital lifeline to young people who often feel isolated and alone, with no-one to talk to.
"It is exactly the kind of voluntary organisation working with young
people the council is keen to support."
The Queen's Award is a national honour created in 2002 to mark Her Majesty's Golden Jubilee and is equivalent to an MBE.
The project will be presented with a commemorative crystal and a certificate signed by the Queen.
For more information on the Opal Project visit www.theopalproject.co.uk