The study determined diversity and team management as predictors of organizational effectiveness of agricultural cooperative societies in Anambra State. The study was guided by two research questions and two null hypotheses tested at 0.05 level of significance. The study employed correlational research design. The area of the study was at Anambra State. The population of the study consisted of 3397 members and the sample size was of 358 members of cooperative societies in Anambra State. One instrument was used for data collection which was validated. The reliability of the instruments was established using Cronbach Alpha with coefficient of 0.855 which aim high for the study. The mean score where used to ascertain the effectiveness of two predictors. Mean and standard deviation were employed to answer research questions. The null hypotheses where tested using regression and observed probability value (P-Value) at the set probability value of 0.05 level of significance. The study found that diversity and team management significantly predict the organizational effectiveness of agricultural cooperative societies in Anambra State which reinforces existing scholarly evidence on the benefits of workforce heterogeneity. Based on these findings, the study recommended that the Agricultural cooperative societies should implement equitable management that ensure balanced representation across gender, age, ethnicity, disability status and religious affiliation.