The film received generally favorable reviews from critics. As of March 2020, review aggregator
Rotten Tomatoes reported that 80% of critics gave the film positive reviews, based on 104 reviews, with the consensus "Refreshingly sweet and sincere,
Kit's doll-and-book-inspired do-good mystery may be geared towards the tween girl but will please audiences of all ages." The site also awarded the film a Golden Tomato for Best Kids Film of 2008.
Metacritic reported the film had an average score of 63 out of 100, based on 27 reviews.
Roger Ebert of the
Chicago Sun-Times awarded the film 3 1/2 out of 4 stars and said it "has a great look, engaging performances, real substance and even a few whispers of political ideas." Writing in
The New York Times, Jeannette Catsoulis said, "this classy, heart-on-its-sleeve movie is packed with laudable life lessons." Elizabeth Weitzman of the
New York Daily News called it "resolutely old-fashioned" and thought "the script feels a little stiff and moralistic at times," but added, "it's hard to fault a film with such an intelligent, good-hearted heroine."
Megan Basham of
World Magazine said, "Even if young fans can't relate the struggles in the movie to their own life,
Kit still offers more than the shows and movies typically aimed at the tween girl market. Besides the simple educational value of giving them a picture to connect with their history lessons, the film also focuses on more significant themes than the materialism and prettiness championed." A less favorable review came from James Verniere of
The Boston Herald, calling the film "one-dimensional" and saying, "I have no argument with the theme of empowerment aimed at an audience of girls. I do, however, take exception to a plot that is banal and predictable and performances that run the gamut from just OK to risible." Josh Larsen of the Illinois paper
The Sun also gave
Kit a negative review, bemoaning the film's plot as condescending towards its target audience, stating, "
Kit Kittredge: An American Girl would be the perfect movie for history-minded 6- to 9-year-olds if it wasn't aimed at the intellectual level of a toddler." == Home video release ==