Our research goal was to examine energy and time parameters of electromagnetic environment created by mobile communication terminals in Crimea and to detect a relationship between morbidity with diseases of the circulatory system (DCS) among people living in the republic due to electromagnetic environment. Electromagnetic environment was determined as per energy flux density (EFD) at terminals, average daily electro- magnetic exposure (ADEE) and individual electromagnetic burden (IEB). Correlation analysis of all the obtained data was performed to detect possible correlations with diseases of the circulatory system. Measurements of electromagnetic environment created by terminals in the region during a period from March 2019 to February 2020 (4,204 measurements at points where people used mobile communications intensely) yielded the following results: average EFD value amounted to 1.43 ± 0.04 µWt/cm2; IEB, 117.80 ± 6.55 (µWt/cm 2)·min; ADEE, 60.56 ± 1.15 min. Electromagnetic environment parameters and prevalence of the most common DCS in Crimea were statistically proc- essed and the following authentic correlations were revealed: between overall morbidity with circulatory diseases and en- ergy (EFD (Тau=0.399; p < 0.01)) and integral (IEB (Тau=0.437; p < 0.01)) properties of electromagnetic radiation; be- tween overall morbidity with diseases that involved elevated blood pressure and IEB (Тau=0.377, p=0.01); between primary morbidity with diseases that involved elevated blood pressure and all electromagnetic radiation properties: EFD (Тau=0.304, p=0.04), IEB (Тau=0.342, p=0.02), and ADEE (Тau=0.299, p=0.04); between primary morbidity with cere- brovascular diseases (CVD) and ADEE (Тau=0.411, p < 0.01) as time property of the examined factor. Energy and time parameters of electromagnetic environment created by mobile communication terminals that have been measured in Crimea are authentically correlated with distribution of morbidity with circulatory diseases and exert their influence on a risk of probable growth in morbidity with these nosologies among people living in Crimea.