This study is about Social Control Based On Social Capital (A Case Study on Dayak-Malay-Madurese at Ketapang Regency, West Kalimantan). The aims of this study are: (1) To know how social interaction exists on multicultural communities at Ketapang Regency; (2) How is the social capital at multicultural communities at Ketapang Regency; (3)and  How is the social control on multicultural communities at Ketapang Regency.  The research method is a case study of multisitus. The observational and deep interview targets:  goverment official leaders and staffs (Camat, Kepala Desa, Kepala Dusun), traditional management or custom leaders, and multiethnic grass-roots.  The research findings are: (1) the form of social capital on Dayak communities at Ketapang Regency is traditional law, whereas on Malay and Madurese communities, the form is tradition of musyawarah based on Islam law (2) preventively the social control by local community as social bonding was run by traditional  leadership, religious leaders, interethnic communication forums, interreligion communication forums and other social institutions leadership; (3) represively  social control by local social capital as social bridging was run on law of  Dayak custom, custom of ethnicity called “musyawarah bersendikan syariat Islam” on Malay and Madurese,  and formal law implementation.