This systematic literature review examines sexuality education programs developed for individuals with intellectual and developmental disability and how they align with national sexuality education standards. Thirty-nine studies were analyzed to determine who received instruction, what topics were covered, and how programs were delivered. Findings revealed an emphasis on healthy relationships and consent, but infrequent coverage of contraception, sexual diversity, and decision-making. Instructional content varied widely and often lacked alignment with national sex education standards. Many studies omitted implementation details critical for replication. Implications for practice include the need to evaluate existing programs using national frameworks and to foster collaboration between educators and healthcare professionals to support accessible, inclusive sexuality education.