This study examines the dimensions of learning organization essential in enhancing Human Resources (HR) effectiveness towards the attainment of the strategic objectives of commercial banks operating in Nigeria. This study adopted a survey research design following a quantitative approach for data collection and analysis procedure. The respondents (professional bankers) were selected using a convenience sampling technique. A structured questionnaire was designed and administered to 305 respondents in the participating commercial banks. The data was analysed using a variance-based structural equation modelling via SmartPLS, version 3.2.9. The results showcased specific learning dimensions to consider in designing learning and development interventions for HR effectiveness in commercial banks. There is a dearth of literature on the specific learning dimensions that play a prominent role in ensuring HR effectiveness in the banking industry in developing countries, particularly in Nigeria. The outcomes of this study contribute to the extant literature and assist HR business partners in adding value to commercial banks through HR effectiveness.