The article is devoted to the exploration of problems of the regulatory framework and legal practices of the sea territories of the Republic of Latvia in the international, European Union and national aspects. The activities of the state administration, in particular law enforcement agencies, require specific understanding of the definition of the territory of the country, taking into consideration the differentiation of the sovereignty of the state in the territories of the sea and airspace arising from modern international and European Union laws, and which would not conflict with the most generally defined meaning of the territory Latvia as in Article 3 of the Satversme (the Constitution). The term “national territory” is often encountered in international, EU and national regulatory enactments, including the Law on National Armed Forces, the Law on the State Border of the Republic of Latvia, the Law on Aviation, etc. The territory of Latvia is land, subterranean depths, inland waters, territorial sea surrounded by the state border of the Republic of Latvia, and air space above them 100 km above sea level. In this area, the Republic of Latvia is sovereign and executes its jurisdiction in accordance with international and national laws. Within the boundaries of its territory (in sea territories, also outside the territorial sea), the state exercises its territorial superiority, which is one of the elements of sovereignty. The territory of a country is not only a national border as demarcated land and space segment of the earth and the atmosphere in which the State exercises its leading role, but also the nature with its components - land, water, sky and the depths of the earth, and all the natural resources that are used in the economy and make the country territories material basis. Within the territory of the country the country may use all compulsory powers over their citizens (also for Latvian non-citizens), foreign nationals and stateless persons, unless international agreements define otherwise.