Suburban areas are connected to central cities by many complex social and economic relations. Labour market, especially commuting, is one of a such dimension. The aim of the paper is to determine sources of income and to identify relations between educational attainments as well as sex and workplace localization in the investigated group. Results confirm that there exists a wider functional area for those of a higher educational attainment. This functional area is also wider for male than for female. However this last relations was proven by a lower correlation coefficient and not in all distinguished subareas. Communes neighbouring Warsaw as well as towns near to Warsaw were identified also as important localizations of workplaces in the investigated group.