The following is a list of characters from Egg Monsters from Mars in the order they are mentioned or appear.
|Book||Dana is the twelve-year-old protagonist and narrator of the book. He's interested in science, so when he finds an abnormal, green egg in his backyard, he's especially interested.|
|Book||Brandy is Dana's spoiled, younger sister. Worst of all, her parents give her everything she wants.|
|Mrs. Johnson and Clark Johnson
|Book||Dana's mother and father are both interested in science. His mother works in a lab, and his father, Clark, develops perfume.|
|Grandma Evelyn and Grandpa Harry
|Book||Dana goes to dinner with his grandmother and grandfather for his sister's birthday.|
|Book||Dana's closest friend throughout the book is Anne Gravel. She is tall and skinny. She also has long red-brown hair.|
|Book||Of the attendees of Brandy's party, the only members that are described by Dana are the "Hair Sisters", because they are seemingly obsessed with styling their hair.|
|Book||Stubby is Anne's sheepdog. The protagonist trips over this dog multiple times. According to Dana, the dog's breath is terrible.|
|Book||The eggs arrived on Earth during a meteor shower that hit the protagonist's town. The creatures supposedly came from Mars.|
|Book||Mrs. Gravel is Anne's mother. At one point, she almost kills the egg monster that Dana found.|
|Book||Dr. Gray is a local scientist who is investigating and trying to contain the egg monsters.|
Community content is available under CC-BY-SA unless otherwise noted.