This study examined sustainable management practices and corporate environmental responsibility of deposit money banks in Delta State, Nigeria. Specifically, the study examined the effect of green operational practices on corporate environmental responsibility of deposit money banks in Delta State and determined the effect of sustainability policy implementation on corporate environmental responsibility of deposit money banks in Delta State. The study adopted a survey research design. The population of the study comprised staff of selected deposit money banks in Delta State, while a sample size of 187 respondents was determined using the Taro Yamane formula. Primary data were collected through the administration of structured questionnaires. The validity of the instrument was established through face and content validity, while reliability was tested using Cronbach’s Alpha reliability technique with coefficients exceeding the acceptable threshold of 0.70. Data collected were analyzed using descriptive statistics, Pearson Product Moment Correlation, and Multiple Regression Analysis with the aid of Statistical Package for Social Sciences (SPSS Version 27). The findings revealed that green operational practices significantly and positively affect corporate environmental responsibility of deposit money banks in Delta State (β = 0.461, t = 7.934, p < 0.05). The study also found that sustainability policy implementation significantly affects corporate environmental responsibility of deposit money banks in Delta State (β = 0.398, t = 6.882, p < 0.05). Furthermore, the correlation analysis indicated strong positive relationships among the study variables, with green operational practices and corporate environmental responsibility showing a correlation coefficient of r = 0.751, while sustainability policy implementation and corporate environmental responsibility recorded r = 0.723. The regression model showed an adjusted R-square value of 0.653, implying that sustainable management practices explained 65.3% variation in corporate environmental responsibility of deposit money banks in Delta State. The study concluded that sustainable management practices significantly enhance corporate environmental responsibility among deposit money banks in Delta State. The study therefore recommended that deposit money banks should intensify the adoption of green operational practices such as paperless banking systems, energy-efficient technologies, and waste reduction mechanisms to improve environmental sustainability. The study also recommended that management of deposit money banks should formulate and effectively implement comprehensive sustainability policies that promote environmental accountability, sustainability reporting, and environmental compliance within the banking sector.

Keywords: Sustainable management practices, green operational practices, sustainability policy implementation, corporate environmental responsibility, deposit money banks.