Ritchie has signed a two year contract with The Terriers. Peter Jackson was sacked last month and Ritchie will take over from caretaker boss Gerry Murphy, although Murphy will have the major say on team selection for Saturday's visit to Glanford Park where Huddersfield take on league leaders Scunthorpe United.
Ritchie told Huddersfield's official website, "There's such massive potential here. There is no doubt that the club is geared up for promotion to the Championship and that has to be the aim now. It's now a case of getting the players re-motivated and once we get into the Championship, we can reassess the situation. I tasted promotion last season and it was a great feeling, now I want to do it again as soon as possible."