The paper is devoted to the emergence of digital diplomacy in the informational space and its public side. Talking into account the development of information technology and the accelerated growth of social networks, a new reality is being considered in the development of the informational space not only for organizations and citizens, but also for states. The idea is substantiated that along with changes in the sphere of public life, the transformation of diplomacy can also take place in the digital age. It is shown how foreign affairs agencies use social networks and other tools to communicate with the public. The author comes to the conclusion that with the objective development of means of communication in the informational space, the evolution of diplomacy takes place, while maintaining its significance in interstate interaction.Problem statement in general and its relation to important scientific and practical tasks. With the development of new technologies in diplomatic practice and with the advent of the concept of “digital diplomacy”, works began to appear in many information sources that raise questions of the broad understanding of the potential of the digital network for the needs of foreign policy. The diplomats had the opportunity to directly, live, monitor various international events, in contrast to the traditional models of diplomatic communication between countries and heads of state. There is an opportunity to analyze foreign audiences, handle and exchange data, develop new formats for multilateral cooperation to provide international assistance to developing countries. One of the main tasks for digital diplomacy is the task of adapting the ministries of foreign affairs to new achievements in the informational and technological field. This problem has been little studied and requires modern research.Formation of research objectives (goals). To trace how the development of digital communication in the information space affects the evolution of diplomacy in the interstate interaction.Statement of the main results and their justification. To indicate an innovative way of influencing foreign society using the Internet, the following is used: Internet diplomacy, social networks diplomacy (Twitter diplomacy), public diplomacy Web 2.0 Public diplomacy, using new technologies, is constantly improving foreign policy mechanisms both to meet the country's foreign affairs needs and to strengthen its position in the information space. It is about improving the interaction of diplomats with foreign Internet users using digital diplomacy, the main tool of which are social networks.Initially, the term “digital diplomacy” was used in relation to US public policy, relying on digital technologies to promote foreign policy interests, the impact of information propaganda via the Internet, social networks and mobile phones on the mass consciousness and the political elite . At the same time, social media make it possible to carry out this task in real time and cover a wide radius of action.For the future of digital diplomacy, the issue of adapting the state information policy to the new tasks and challenges of the information technology sphere is important. It is important to understand that modern diplomacy has evolved and will change along with the objective development of means of communication in the informational space, while retaining its significance in the interstate interaction.Conclusions and prospects for further research. Information technologies can transform and change, but at the same time they represent one of the key technological products of current society, introducing into the global world order the increasingly pronounced element of the concentration of the Network. For effective and innovative development of Ukraine, new foreign policy projects in the digital sphere of the informational space are needed. When implementing modern projects, the state should take into account the opportunities offered by the informational environment. These opportunities are provided by the promising toolkit of digital diplomacy.It is necessary to consider the potential of digital diplomacy for Ukraine taking into account the potential for further development of the informational sector for the domestic economy, national security, and public administration. It is important to try to find a balance between informational security and active foreign policy in the informational space aimed at increasing the attractiveness of Ukraine in the world. It is necessary to involve civil society representatives in the implementation of foreign policy goals with the coordinating role of the state, which is a prospect for further research.