Background: Youth may be reluctant to seek health care from school health providers due to feeling embarrassed or stigmatized in the health office environment or worried about their confidentiality. The purpose of this project was to create a set of youth-centered health posters that promote youth engagement with nursing staff and to standardize health messaging across high schools in Hawaii school-based clinics. Methods: Two community advisory boards, 1 composed of 10 youth stakeholders (mean age 17 years) and the other of 7 adult stakeholders, informed poster development utilizing web-based discussion groups. The discussions were transcribed, and additional data was collected using field notes and anonymous digital messages. Adult advisory board members also provided feedback on suggested poster text through an online survey. Results: Youth and adult advisory board participants identified 4 key health concerns facing youth: confidentiality, sexual health, relationships, and mental health. Based on input from the 2 advisory boards, 4 posters were developed, each centered on 1 key health issue. Implications for School Health Policy, Practice, and Equity: School-based posters can convey important messages to help youth understand their health care rights and responsibilities, as well as identify important issues open for discussion with nurses. Conclusion: Posters are an underutilized tool for school health providers to create welcoming, inclusive health care environments and facilitate health-related conversations with youth. This paper describes participant feedback about the characteristics of a memorable poster and briefly outlines current knowledge and recommendations for school health providers regarding each of the 4 health issues.