The 34-year-old will take over at
Boothroyd, a former Hearts and Bristol Rovers defender, has signed a 12-month rolling contract and Keith Burkinshaw has been named as his number two.
Nigel Gibbs, who had been acting as temporary manager following Lewington's departure has been also been named in Boothroyd's back room staff while reserve team manager David Hockaday is to retain his position.
Announcing the news today,
"His knowledge of the game, understanding of players and tactical judgement shone through during our discussions, leaving the board in no doubt as to who they felt was the best man to take the club forward."
Boothroyd, whose playing career was ended by injury at the age of 26 while at Peterborough United, holds a Uefa 'A' coaching certificate.
He began his coaching career at
He then went on to become youth development manager at