Abstract The study examined the impact of employee participation on the efficiency and effectiveness in National Orthopedic Hospital, Lagos State. Demographic data from National Orthopedic Hospital, Lagos State were analyzed using simple percentages and frequency counts. Three hypotheses postulated for the study were statistically tested using the Multiple Linear Regression. Research results show that that employee consultation and Joint decision making have positive and significant influences on effectiveness and efficiency of National Orthopedic Hospital in Lagos State, while employee delegation was found to have a negative and significant effect influence on effectiveness and efficiency of National Orthopedic Hospital, Lagos State. To improve organizational efficiency and effectiveness National Orthopedic Hospital, Lagos State, we recommend that management of the public hospital state should adopt a participatory approach in decision making to encourage employees' affirmative commitment to organizational goals and objectives, which will breed a harmonious working environment devoid of bitterness and hostility. Keywords: Effectiveness, Efficiency, Employee Participation, Hospital, Organisation.