Variety calls it "ambitious, restrained and well-mounted". Moria has a mixed review. HorrorNews.net says it's "quite a interesting and intelligent movie that knows how to keep its audience glued to the activities and facts presented."
DVD Talk says, "in its own way it's much more frightening than most of the schlock fests regularly served up in that genre" and concludes
Lake Mungo is a different kind of horror film. It doesn't follow a traditional narrative, and lacks gore and cheap scares. What it does have is a powerful story, believable and familiar characters, and a subtle, creeping atmosphere of dread that pervades the film. This is a superior effort, one that will keep you up at night.Rotten Tomatoes has a critics score of 93%.