SUMMARYAim of the study. Evaluation of differences in health-related fitness (H-RF) among adults residing in the Świętokrzyskie Voivodeship due to age and with regard to socioeconomic factors such as: level of education, place of residence and financial situation.Material and methods. The study was performed using the method of observation of 1,032 people aged 20-59 years, including 517 women and 515 men. Morphological, muscular, motor and cardio-respiratory components were taken into account in the assessment of physical fitness focused on health (H-RF). The examined group comprised people representing various stratification systems in terms of gender, age, education, place of residence and financial situation.Results. It has been found that health-related fitness (H-RF) is significantly differentiated in society. Age is the factor most strongly differentiating various components of adult physical fitness. On the one hand, this reflected strong regressive and involutional changes that occur over the course of time, yet on the other it confirmed intergenerational changes. In addition, factors which significantly differentiate various components of adult physical fitness include place of residence, level of education, and financial situation.Conclusions. Higher levels of education, better financial situations and living in a city are associated with more desirable levels of various components of adult physical fitness and are indications of optimum health levels. Th e social differences in physical fitness among men are more evident than among women, which is probably connected with men's higher eco-sensitivity.