Actress Melissa Sue Anderson is best known for her iconic role as Mary Ingalls in the popular TV series Little House on the Prairie. As of 2025, Melissa Sue Anderson net worth is estimated to be around $1.5 million. This wealth comes from her long-lasting career in television, film, and her time in Hollywood during the '70s and '80s. Despite stepping away from acting in later years, Anderson’s impressive career and smart investments have secured her financial success over time.