Purpose: The purpose of the study was to investigate the impact of teenage childbearing on family socio-economic well-being in Ruiru, Kiambu County, Kenya, focusing on financial strain, educational disruption, post-partum experiences, and family support. Methodology: Using family stress, human capital, and social support theories, the study adopted descriptive survey design targeted 378 teenage mothers, with a sample of 195 selected using Yamane’s formula. Data collection involved semi-structured questionnaires and interviews, analyzed quantitatively through descriptive statistics and regression, and qualitatively through thematic analysis. Findings: The findings reveal that 85.5% of respondents faced financial difficulties within six months, and 55% reported disrupted high school education, leading to long-term setbacks. Emotional and health challenges characterized post-partum experiences, and 61.1% of respondents found family support insufficient to meet socio-economic needs. The study concludes that teenage childbearing significantly disrupts family well-being, recommending comprehensive support programs, including financial aid, childcare, healthcare, and community initiatives, to better assist teenage mothers and reduce their socio-economic burdens. Unique Contribution to Theory, Policy and Practice: This research uniquely contributes to theory, policy, and practice by creating a comprehensive model that integrates empirical findings and qualitative insights, thereby enriching existing theories. Additionally, it provides practical recommendations for targeted support programs that guide policymakers in alleviating socio-economic burdens and enhancing family well-being.