In the article the attempt to understand the impact of human capital externalities in the process of development of the city. Within the economic area of the city can appear human capital externalities associated with the "overflow" of knowledge and network effects that can be determinants of intensification of innovation - infrastructure elements of modern urban environment and, consequently, the factors of economic growth and economic system of the state as a whole. Author's concept of ways to improve the urban environment, taking into account the externalities of human capital.
Keywords: human capital externalities, urban environment, knowledge, information, agglomeration, urban infrastructure