The article describes the essence of the concept of “internally displaced person”. Theoretical and legal approaches to the content of the concept of “internally displaced persons” have been studied. It was established that forced migration plays an important role in the modern worldmigration process of the population of Ukraine. It is argued that for the first time the term “internally displaced person” was used in jurisprudence in the last decade of the 20th century, when the need for an international response to the rather important problem of protecting the rights of displaced persons definitely arose. Statistical data on the number of internally displaced persons in Ukraine are indicated. It is noted that precisely as a result of military aggression by the Russian Federation on the territory of Ukraine, the problem of forced migration and its solution is one of the main ones for the state and society. It is proven that an internally displaced person is a citizen of Ukraine, a foreigner or a stateless person who is in the territory of Ukraine on legal grounds and has the right to permanent residence in Ukraine, who was forced to leave or leave his place of residence as a result or in order to avoid negative consequences. It is indicated that internally displaced persons are under the legal protection of their country in accordance with international human rights legislation. The article indicates the main reasons for forced migration of the population, which encourage citizens to move within the borders of their country. These include, first of all, military conflict, occupation or annexation of territory, cruel treatment, manifestations of violence, genocide of the population, violation of human rights and freedoms, as well as environmental, social, economic, man-made and other causes. It was emphasized that internally displaced persons need to adjust to a new place of residence, which should become safer for them. It has been studied that the protection of internally displaced persons implies an important obligation for the state to create legal, social and economic conditions for the realization of their rights and freedoms, under which it is possible to protect the rights of individuals, as well as the activities of state organizations for the protection of human rights. The article offers the author’s definition of the essence of the concept of “internally displaced person” in Ukraine.