Extension has a role to play in workforce development by preparing the next generation to be successful communicators. While Extension 4-H youth programs have contributed to public speaking development since their inception, there has not been a validated instrument to assess young people's public speaking self-efficacy. We utilized an iterative-scale development process to develop, test, and refine such a tool. We hope youth development professionals will consider using the Youth Public Speaking Self-Efficacy (PSSE) survey tool to measure and report youth's PSSE skills, along with the sources influencing these skills, to help with program planning, implementation, and professional development activities.