This study aims to determine the impact of regional integration on the economic growth and development of East African Community, with specific focus to Kenya. The early integration initiatives and the new wave of regionalism have triggered greater attention to the various possible forms and shapes that regional integration can take. This ranges from shallow forms of integration, which place greater reliance on cooperation and coordination, to more traditional forms of customs unions and free trade agreements, to deeper forms of economic integration (monetary unions, common markets) and other types of strategic, security, political, social regional integration and cooperation agreements. This study is therefore designed to examine the impact of regional integration on the security, trade and investments in the East African Community, focusing on Kenya. This study will adopt a case study research design. Data will be collected from secondary sources. This will involve reviewing material sources in the form of journals, books and reports. The collected data will be analyzed thematically by constructing themes that will help discuss various impacts of regional integration on the economic growth and development in Kenya. Data will be presented in a narrative form which will be derived from evidence secondary sources that will be used to support and illustrate themes.