This study examined the roles of motivation in improving organizational effectiveness, the roles motivation plays in getting the best output from personnel in an organization. The research adopted a descriptive survey of correlation type. Organizations were selected using simple random sampling technique comprising 100 workers. A questionnaire titled “Roles of motivation in improving organizational effectiveness was used to gather information from the 100 respondents. Research questions were raised for this study and answered with descriptive statistics of mean scores and standard deviation. Research hypotheses were formulated and statistically tested using inferential statistics of Pearson product moment correlation statistic at 0.05 level of significance. The result of the findings revealed that motivation have great impact in improving organizational effectiveness; there is a significant relationship between roles of motivation and improving organizational effectiveness; there is a significant relationship between employee satisfaction and improving organizational effectiveness. Based on the findings, it was recommended that management should encourage interpersonal relationship amongst co-workers to promote a sense of belonging and unity amongst staff. Also, managers should ensure employees are involved in decision making processes and should be given chance to air their views in the advancement of the organization and finally management must also strive to ensure that all employees engage in training and retraining programs to acquire new skills and also have equal opportunity to utilize their skills and competencies where career development to opportunities should be clearly communicated to employees.