The study investigated the relationship between change readiness and organizational performance in Nigeria. A descriptive survey using a multi-stage sampling techniques was used to collect a sample of 150 respondents that represent the sample. To achieve the objectives of the study, change readiness was captured by five measures namely managerial style, work environment, employee welfare, technological innovation, and employee involvement in change process. On the other hand, organizational performance was captured by five measures namely profit maximization, wealth maximization, customer expansion, solvency, and corporate social responsibility. The finding revealed a significant relationship between organizational effectiveness (managerial style; work environment; employee motivation; technological innovation and employee involvement in change process. The study submitted that readiness of change is instrumental to promoting the effectiveness of organizational performance.