Estimates of the Losses Incurred by the Society Living in the Functional Urban Areas. The study presents estimates of the losses incurred by the society living in the Functional Urban Areas of regional capitals of Poland in connection with the phenomenon of urban sprawl. The estimates are presented in terms of diagnostic to 2016 and as projected reaching 2030. The results of the analysis indicate that the social losses due to the urban sprawl in Poland can be evaluate as high, as it amounts to 25.4 billion PLN per year. In the 2030 losses could reach nearly 0.5 trillion PLN, of which 264 billion PLN of losses incurred directly, and 227 billion PLN on the value of lost time.