Jackson's side sit on top of League One on the back of four wins and a draw following their opening-day defeat at Nottingham Forest.
"I would like to accept the award on behalf of everyone who works behind the scenes at the club," said Jackson.
"I also accept it on behalf of the players. Without their hard work we would not be where we are today."
United travel to the Galpharm Stadium on Friday in a top of the table clash.