This study aimed at establishing the effects of corporate governance practices and policies on the financial performance of listed commercial banks. A cross-sectional research design was used in the study. Whereas there has been renewed interest in corporate governance, there is a paucity of relevant data from empirical studies. The study sought to eliminate the limitations in the depth of the understanding of corporate governance issues with respect to financial performance in the banking sector. The population involved were all the 10 listed commercial banks in Kenya. Return on assets and return on equity were key variables that defined bank performance; whereas firm size was adopted as a control variable. Corporate governance structures were measured using board of directors, ownership structure, and audit committee structure. The study used secondary data which was gathered from company annual financial reports, company websites and other financial statements spanning a period of five years from 2012-2016. Data analysis was primarily done using descriptive and inferential statistics. Under descriptive statistics; mean, maximum, minimum and standard deviation were used and under inferential statistics; Pearson correlation analysis and multiple regression analysis were employed. The findings of the study among others indicated that there is a negative and significant relationship between Board of Directors, ownership structure and audit committee structure with the financial performance of listed commercial banks in Kenya in terms of Return on Assets (ROA) and Return on Equity (ROE). Specifically, the study concluded that the number of board committees, number of non-executive directors, percentage of foreign ownership and number of audit committee meetings have a positive impact on the financial performance of commercial banks while board size, government ownership, and board diversity have a negative impact on financial performance of listed commercial banks.