This study examines how regional economic blocs influence development in Africa through a specific case of Sierra Leone. A mixed-methods approach was employed, combining quantitative data from national surveys with qualitative insights from local interviews to analyse the influence of ECOWAS and EAC membership on Sierra Leone's development trajectory. Employment in Sierra Leone within regions aligned with ECOWAS increased by 15% compared to those not part of the bloc, while poverty levels decreased by 20% among members of EAC. These trends highlight potential positive impacts of regional economic integration on socio-economic indicators. The findings suggest that membership in regional economic blocs like ECOWAS and EAC has significant positive effects on employment rates and reduction in poverty, which could inform policy for broader African development strategies. Given the positive outcomes, Sierra Leone should consider further integration with other regional blocs to maximise these benefits. Policymakers should also focus on bridging regional disparities within ECOWAS membership to enhance overall economic performance.