Republic of Croatia Ministry of the Interior and the police are primarily responsible for protection of all citizens. Their priority is preventive and proactive action. Due to their public role, they have to ensure that basic information on events of interest to citizens and the measures taken on that occasion are constantly available. It is very important that citizens are confident that the police and all employees of the Ministry of the Interior do their job legally, protecting the interests of citizens and respecting their human rights, freedom and dignity. Therefore it’s crucial to choose right public access and, based on quality communication, gain public trust and build the reputation of the organization. The Public Relations Department coordinates communication of Ministry and the police with citizens and other public and attempts to influence the feeling of security and confidence in work of the Ministry and the police. It is particularly important to build a good relationship and communication with the media as they have a major influence on the formation of public opinion. Very important is also a preparation for crisis situations which implies quality communication in unplanned and unwanted circumstances that might have a major impact on the reputation of the organization. The research on the impact of the communication of Ministry and the police has shown the correlation of communication messages to the respondents with a feeling of security and approval of police work.