Parenting plays a major role in the development and transformation of young adults. However, in recent years, the aptness of parents has been greatly reduced. Considering the increase of broken marriages and single parenting in Nigeria, young adults may be at risk of depreciating mental health due to unexpected emotional challenges with respect to the immediate family. This cross-sectional survey examined the mental health status of undergraduates as a function of parent’s marital status. One hundred and fifty-six undergraduates selected from three higher institutions responded to the Awaritefe Psychological Index (API), measuring mental health status. Two hypotheses were tested at p=0.05 level of significance and the results revealed that parent’s marital status did not significantly predict undergraduates’ mental health status (β=-0.076, t=0.951, p>0.05); however, the type of higher institution significantly predicted undergraduates’ mental health status (β=0.159, t= -1.985, p<0.05). Since this study revealed that the institution of learning is an effective predictor of undergraduates’ mental health status, it is recommended that institutions of learning should be made more academically conducive for undergraduates to foster better mental health.