The Statistical Office in Warsaw has prepared the third edition of the publication “Children in Mazowieckie voivodship” using data coming from statistical surveys as well as from administrative sources. The information presented in 5 sections concern: demographic phenomena, child’s place in and outside a family, situation of families with dependent children, social care, health and medical care, education, culture and leisure, health and life hazards as well as comparisons to the European Union countries (within the range of selected indicators).