This investigation deals with a study of individuals who underestimate health risk factors (RFs). Objective — to calculate the frequency of negative health RF estimates obtained from a survey of the able-bodied population in relation to its age, gender, and social, economic, and demographic characteristics. The results of surveying the representative samples from 13 regions that had participated in the ESSE-RF study (2012—2014) were used for this analysis. A total of 22 258 people (8544 men and 13 714 women) aged 25—64 years were examined. Socioeconomic indicators, such as age, education, material wealth, urban or rural residence, and employment status; and demographic indicators, such as associations with marital status and the presence and number of children, were analyzed. At present, the proportion of people who underestimate RFs has been shown to be several times less than those who recognize their harm. However, every five respondents underestimate at least one RF. Low physical activity (LPA), imbalanced nutrition (IBN), smoking, as well as obesity are proved to be most commonly underestimated. RFs are most frequently underestimated by 25—34-year-old respondents (LPA, obesity, hypertension, and stress) and by 55—64-year olds (smoking, excessive alcohol consumption, and alcohol abuse — AA). The respondents aged 35—44 years more often appreciate RFs correctly. As compared to persons with higher education, those with lower secondary education more frequently underestimate health RFs (LPA, hypertension, stress, IBN, and AA (only women). RF underestimation is unassociated with well-being. The unmarried and childless more commonly underestimate the impact of RFs than married and divorced people with children. Special contingents of respondents who more frequently disagree with the negative impact of some RFs on health have been identified. These include low educated, unmarried, and childless people, men with 1—2 children, temporarily unemployed women, as well as disabled women (perhaps because they are unaware of the dangers of RFs).