The purpose of this study is to analyze the Republic of Kazakhstan’s multi-vector foreign policy and participation of regional integration organizations. In that sense, historical perspective of regionalism, Kazakhstan’s foreign policy and market economy in pre-Soviet, Soviet and post-Soviet eras, and finally Kazakhstan’s membership in international organizations are discussed in this study. The Commonwealth of Independent States (CIS), Collective Security Treaty Organization (CSTO), Eurasian Economic Union (EEU), Conference on Interaction and Confidence Building Measures in Asia (CICA) and Shanghai Cooperation Organization (SCO), are examined regarding their establishments, aims and Kazakhstan’s role within them. This thesis mainly argues that after gaining independence, sovereign states could come together and establish mutually beneficial collaborations through regional or international organizations. The result of the study shows that pursuing stable economic and political relations with other countries having mutual interests might be possible and functioning for Kazakhstan thanks to Nazarbayev’s successful strategy of multi-vector foreign policy and regional integration efforts.