This study investigated the current status of depressive symptoms among Chinese college students and analyzed the association between being an only child and depressive symptoms. A cross-sectional survey was conducted with 771 college students from five universities in Jilin Province. Depressive symptoms were assessed using the Center for Epidemiological Studies Depression Scale (CES-D). The results indicated that 28.4% of college students exhibited depressive symptoms. Only children reported significantly higher depressive symptom scores compared to non-only children, and female students had higher scores than their male counterparts. These findings highlight the importance of targeted mental health interventions for only children.