Background: Visionary leadership significantly enhances organizational agility among nursing managers by providing a clear future-oriented vision and strategic direction that empowers to anticipate change, adapt quickly and respond effectively to evolving and complex healthcare environments. Aim: The study aimed to assess the effect of visionary leadership educational program on organizational agility among nursing managers. Research design: A quasi-experimental study design was utilized. Setting: The current study was conducted in all inpatient units of medical and surgical departments at Benha University Hospital. Subjects: The subject consisted of (62) nursing managers who were working in the above mentioned study settings. Tools of data collection: Three tools were used to collect data; visionary leadership knowledge questionnaire, visionary leadership practice self-report questionnaire and organizational agility questionnaire. Results: The most (96.8%) of nursing managers had poor knowledge level regarding visionary leadership at pre-program phase, which improved to be less than three quarters (70.9%) at immediate post program phase and slightly declined to more than three fifths(64.5%) at follow up phase. Less than one third (32.2%) of nursing managers had high practice level regarding visionary leadership at pre-program phase, which improved to be less than three quarters (72.6%) at immediate post program phase and slightly declined to more than three fifths (64.5%) at follow up phase. The lowest percent (9.7%) of nursing managers had reported high level of organizational agility at pre-program phase, which improved to be more than three fifths (61.3%) at immediate post program phase and slightly declined to be less than half (45.2%) at follow up phase. Conclusion: There was an improvement in nursing managers' knowledge and practice regarding visionary leadership as well as there were an improvement in organizational agility at the immediate post &follow up program phases compared to preprogram phase. Recommendations: Integrating visionary leadership principles into strategic planning for ensuring that organizational vision and future-oriented goals guide managerial practices.