This dissertation deals with fiscal policy measures to mitigate the effects of the COVID-19 virus pandemic that hit the world in early 2020. The effect of the COVID-19 virus is known to be highly contagious and with a high mortality rate compared to other similar viruses in the risk groups. The crisis caused by the COVID-19 pandemic caused unprecedented disturbances. Control measures adopted by the authorities included the temporary closure of many production activities and the general closure of the population. These events have led to evidence of extraordinary fiscal policy measures, aimed at strengthening the health system, mitigating the adverse effects of the pandemic on the economy and supporting economic activity in the later stages of recovery. This paper examines fiscal policy measures in the Republic of Croatia and compares them with European Union countries. It is established that the effects of such measures depend on many factors, such as the current state of the economy and the form of the measures used. Other possible factors that affect such effects are the severity of epidemiological measures, the number of cases of infection, etc. A positive statistical link between fiscal assistance measures and growth in industrial production and growth or decline in unemployment, but a negative statistical link between fiscal assistance measures and growth GDP.