Internal public relations, ie internal communication, includes communication within the organization that can flow from superiors to employees, from employees to superiors and between employees. Quality internal communication in times of crisis is the key to the company’s survival in the future, so in March, April and May 2020 many Croatian companies found themselves in an uncertain situation where they had to adapt internal communication and organizational culture to new circumstances. The COVID-19 crisis hit the whole world in 2020, and it is still inconceivable what and how many consequences it will leave behind. Its effects are clearly visible in the day-to-day operations of most companies. In the most challenging period during March, April and May 2020, companies had to show how they cope with the crisis and how much they are ready for it in all aspects of their business and management. Why is employee satisfaction with internal communication important? The reason is very simple, satisfied and motivated employees and successful communication with internal stakeholders will create satisfied customers, users and successful communication with all external stakeholders. The subject of this paper is the internal communication of Croatian companies during the COVID-19 crisis and the first lockdown with special emphasis on organizational culture and relations with employees and employee satisfaction with internal communication during the first lockdown. The period of the first lockdown in the Republic of Croatia includes March, April and May 2020. For the purposes of this paper, an anonymous questionnaire was conducted on a sample of 84 respondents. The questionnaire sought to examine the satisfaction of respondents with internal communication and communication channels in their companies with an emphasis on organizational culture and relationships with employees during the first lockdown in the Republic of Croatia. The results of the survey indicated that respondents were satisfied with the communication processes in their organizations during the first lockdown, and that the COVID-19 crisis did not significantly change the attitude of employees towards employers, but the results showed that there is room for improvement in internal communication management culture.