Abstract Corporate social responsibility has become a crucial aspect of the stewardship expected from the organisation's directors to its stakeholders globally. Hence, this study was conducted to examine the impact of corporate social responsibility on the financial performance of selected listed banks in Nigeria. The specific objectives of the study were to; (i) investigate the effect of corporate social responsibility expenses on the Operating Profit of the selected Nigerian-listed banks in Nigeria; and (ii) examine the impact of diversity and inclusion on the Operating profit of the selected Nigerian-listed banks in Nigeria. Secondary data were collected from selected Nigerian-listed banks' annual reports, World Bank fact sheets, and Macrotrend data reports to achieve the study objectives. Fixed-effect and random-effect regression to analyse data from 10 selected Nigerian-listed banks. The study revealed that corporate social responsibility expenses do not have any effect on the financial performance of the selected Nigerian-listed banks in Nigeria, since the p-value of this variable showed a positive, insignificant impact. Likewise, the study showed that diversity and inclusion have statistically insignificant impacts on financial performance. Also, the study argued that operational efficiency and company size have a statistically significant impact on financial performance with (β=96.20, p<0.01 and β=0.196, p<0.01), for operational efficiency and company size, respectively. This study recommends the need to formulate a standardised reporting template for reporting comprehensive corporate social responsibility among the selected listed banks. The managers of the big companies are advised to pay attention to their operation efficiency due to its impact on financial performance. Investors are advised to consider companies’ size when making investment decisions due to it’s impact on financial performance. KEYWORDS: Financial performance, CSR, Diversity and inclusion, company size, operating profit