This article is devoted to the problem of protecting critical space infrastructure as one of the main elements ensuring national security in general, as well as the safety of the population. This article will discuss such concepts as critical infrastructure and critical space infrastructure as one of its parts, the threats faced by states, and ways of protection. It will also consider several national strategies for protecting such infrastructures, the need for cooperation at various levels, which will ensure security in this area, and a quick response to threats. The author offers the following definition of critical infrastructure. The critical infrastructure of Ukraine is systems and resources, physical and virtual, that ensure the normal functioning of the state, ensure an adequate standard of living for the population, extraneous interference in the work of which will lead to negative and unforeseen consequences in the life of the society and may constitute threats to national security