The circular economy (CE) is gaining attention as a strategy for sustainable transitions, particularly in island regions facing isolation and resource constraints. Crop-Livestock Integration (CLI), have emerged as practical application of CE principles. This study examines CE objectives according to local stakeholders and the barriers to CLI implementation. Research was conducted on Réunion Island in 2023 in 3 phases: (i) stakeholder mapping identified relevant actors; (ii) 38 semi-structured interviews were conducted with plant and animal sector representatives, authorities, and cooperatives; (iii) a participatory workshop with 30 stakeholders to complete and correct collected information. Key CE objectives was mentioned by the stakeholder: waste reduction and resource efficiency (9 mentions), reconfiguring territorial metabolism (8 mentions), reducing biomass imports by optimizing local biomass (5 mentions), and converting waste into resources (5 mentions). 11 CLI initiatives were identified, such as organic fertilizers from livestock effluents, using sugarcane straw as poultry litter, and developing arenas for exchanging and facilitating collaboration between stakeholders. 3 main barriers were identified: governance, economic, and technical constraints. Governance challenges, the most cited, included overly restrictive, locally misaligned regulations and difficulties coordinating actors for collective projects. Economic challenges primarily stemmed from the high levels of uncertainty associated with these initiatives, which hinder the access to private funding. Additionally, the limited availability of locally adapted human and material resources represented a significant technical constraint. In conclusion, stakeholders acknowledge the critical role of CE in facilitating sustainable transitions within Réunion Island. Despite the existence of multiple barriers, CLI initiatives continue to be developed. However, the increasing number of CE initiatives raises conce