Data presented in the publication concern quantity and quality changes in size and structure of the population, as well as the following topics: marriages, separations, divorces, births, deaths, migration, which enable to diagnose demographic situation of Mazowieckie voivodship in 2015. Moreover, the data allow for analysing different areas of socio-economic life, e.g. data on population by educational and economic age groups enable to determine influence of demographic factor on future of educational system, labour market, and pension benefits.

Main part of the publication is preceded by four review tables with selected information on size of population and vital statistics as well as on intensity of demographic phenomena. First of them presents demographic phenomena within Mazowieckie voivodship in the years 2000, 2005 and 2008–2015, and the following – a review of up-to-date information on subregions and powiats of the voivodship as well as districts of the Capital City of Warsaw.