This study investigated the impact of firm attribute on performance of listed Deposit money banks in Nigeria from (2011-2020). Two research questions and corresponding two hypotheses were formulated for the study. Ex-post facto research design was employed in the study. The population of the study included all Deposit money banks quoted on the Nigerian Exchange Group (NXG) (NSE) as at 31st December 2020 with a sample size of Twelve (12) Deposit money banks selected from the population. The study relied on secondary sources of data which was obtained from Annual reports of sampled companies as provided by individual companies,

Nigerian              Exchange            Group   (NXG)   website                and        Machame            Database

(www.machameratios.company.site). Amongst other preliminary analysis and tests, the panel least square regression analysis was done in validating the hypotheses. The study found that firm size and board gender diversity has a statistically significant impact on performance. Consequent on the findings emanating from the study, the study recommended amongst others that there should be a reasonable mix of the board of directors and risk committee to recognize female directors as this will have direct impact on the firms’ image and goodwill. Also, the study recommends that, the managements of banks should find ways to improve and acquire the optimal utilization of their assets, while making maximum use of their resources during the operation processes as this would help them in improving their earnings.