This study examined the influence of socio-demographic factors (age at marriage, educational attainment, length of marriage, religiosity, and socio-economic status) on marital satisfaction among 250 married individuals in Ibadan. Correlation analysis revealed that socio-economic status was positively and significantly associated with marital satisfaction (r = 0.284, p < 0.01), highlighting the pivotal role of financial stability in reducing stress, improving emotional support, and enhancing conflict resolution within marriage. Religiosity showed a small but significant negative relationship (r = - 0.127, p < 0.05), suggesting that strict adherence to religious norms may sometimes create tension when personal or spousal expectations differ. Educational attainment, length of marriage, and age at marriage were not significantly correlated with marital satisfaction, indicating that these factors alone have limited influence. Multiple regression analysis demonstrated that the five socio-demographic variables collectively explained 30.6% of the variance in marital satisfaction (R = 0.570, F (5, 244) = 16.674, p < 0.05). meanwhile, the standardised regression coefficients indicated that socio-economic status and age at marriage contributed positively to marital satisfaction, while religiosity and educational attainment had negative effects, and length of marriage was not statistically significant. These findings emphasise that marital satisfaction is multidimensional, shaped by the interaction of financial, relational, and cultural factors rather than any single variable. The outcome suggests that interventions aimed at improving marital well-being in Ibadan should prioritise standardised financial stability, support negotiation of religious and educational expectations, and foster adaptive coping strategies and maturity among couples. These insights offer practical guidance for counselling psychologists, policymakers, and family welfare programmes seeking to enhance relational quality in culturally diverse contexts