Background: The aim of the analysis was to evaluate the concentrations of radioactive radon in the air in workplaces located in various regions of Poland and to identify areas at risk of elevated radon levels. The study analyzed the number of instances where the reference level of 300 Bq/m^³ (becquerel – Bq) was exceeded, as well as the observed differences in radon concentrations across different buildings. Material and Methods: The analysis was based on the results of commercial measurements carried out by the Institute of Occupational Medicine in Łódź in 2022–2023. Measurements were taken in 6 provinces, across workplaces associated with various types of activities. The measurements were conducted during the heating season October–March. Track detectors were placed in dosimetric cassettes and sent to the clients with instructions for use. The returned dosimeters were subjected to chemical processing, followed by reading the track density using an automated image analysis system, in accordance with the accredited procedure. Results: The majority of measurements were conducted in the Świętokrzyskie and Dolnośląskie voivodeships. The highest average radon concentrations were found in buildings located in spa areas, while the lowest levels were recorded in production halls. Conclusions: The results confirm the need for ongoing monitoring of radon concentrations in Poland and highlight the importance of further studies on the factors influencing its levels. The study also proposes preventive strategies for areas with the highest radon exposure. Med Pr Work Health Saf. 2025;76(1)