Abstract: In the discussions of International Law, nationality (citizenship) is considered as one of the components of personality. Another related concept is personal status which is discussed in Private International Law. Nationality orientation is determined based on how individuals, legal or natural persons, are placed in different countries in the world, their materials and spiritual aspects, their political status and their original or acquired nationality through birth or marriage. The present study is an attempt to examine the concept of nationality, its importance and realization conditions and governing principles in Private International Law. Keywords: Acquired Nationality, Nationality, Original Nationality, Private International Law