In the dynamic terrain of today's business world, the intricate relationship between internal marketing strategies and organizational commitment has emerged as a pivotal area of exploration, as exemplified by this study's investigation into the private commercial banks of Chittagong, Bangladesh. This study investigates whether there are any statistically significant gender differences in internal marketing and organizational commitment and how internal marketing practices influence organizational commitment among employees. Five dimensions are selected for internal marketing, namely communication, supervision, intangible benefits, compensation, and intermediaries. The information obtained from a total of about 130 respondents with a well-structured questionnaire and different kinds of statistical and econometrical tests is used to analyze the data. The result of the Mann-Whitney U test suggests there is no statistically significant difference in internal marketing and organizational commitment between male and female employees. The Spearman correlation test’s outcomes depict that except for supervision, the rest of the internal marketing factors have a positive correlation with organizational commitment. The outcomes of ordinal regression analysis indicate that compensation, intangible benefits, intermediaries, and communication positively influence organizational commitment. Although the effects of compensation, intermediaries, and communication on organizational commitment are significant, the effect of intangible benefits is not. Compensation fosters employee appreciation, motivation, and a supportive workplace culture. Intangible rewards and open communication foster loyalty and dedication. Intermediaries play a pivotal role in bridging communication gaps between supervisors, managers, and employees, impacting employee commitment in organizations. On the other hand, supervision has negative and significant effect on organizational commitment. Overbearing supervision can negatively impact organizational dedication, reducing job satisfaction, trust erosion, and burnout.