The paper aimed to examine the impact of corporate governance on the financial performance of commercial banks in Jordan. The variables used to measure corporate governance were the board of directors' size, independent members of the board of directors, and the number of audit committee members, while those used to measure financial performance were return on investment, return on equity and earnings per share. The study used a quantitative approach based on the data of 12 commercial banks in Jordan during the period 2005-2022. The panel data were analyzed using the EViews software based on the ordinary least squares time series technique. The paper found the effect of all corporate governance variables on both return on investment and return on equity. However, it indicated that the board of directors' size and the independent members of the board of directors had an impact on earnings per share. This study highlighted corporate governance variables in one of the significant sectors of developing economies. Moreover, it recommended the need to review the principles used in selecting members of the audit committee for commercial banks in Jordan, due to their importance in developing long-term financial performance.