The article attempts to look at foreign and security policy of independent Lithuania as a state identity formation process. The analysis is based on social constructivism methodology, underlying the predominant role of immaterial factors in the development of international system. The article begins with the presentation of the Lithuanian geopolitical environment as an interaction of differently constructed identities. In this context, the place and role of Lithuania in the Northern dimension of the EU before and after the EU membership is analyzed. In analyzing Lithuanian foreign policy landmarks after the double enlargement, a wider survey of problems and perspectives of its participation in the latest EU foreign policy initiatives and its relationship with the EU Eastern dimension is given. The article states that Lithuania, trying to become the center of regional cooperation, is creating a civil state identity assembling other states by force of the example to be followed. However, the regional identity of Lithuania is still under formation: pretensions to unite the North, South and East are conceptually not grounded enough and the narrative uniting the region is still at an embryonic stage. In its position Lithuanian foreign policy substantiation is closer to the EU Northern and not Eastern dimension.