The population of Kiev Province show higher level of primary morbidity of cerebrovascular disorders (CVD) and rate of its increment than on the average in Ukraine, as per medicostatistical analysis in space and time of CVD prevalence in the studied territories. Among regions in the highest ranks in respect of levels and rates of increase in morbidity over five post-Chernobyl years are Ivankov and Polesye regions which residents had become victims to ChNPP breakdown. It should be noted that in previous years the above regions were rated as being in the ranks below the average in the area.