Motherhood represents one of the most challenging periods of transition in the postpartum period, where episodes of depression can be twice as high as during other periods of a woman's life. Postpartum depression is a public health problem and affects a large part of the world's population. Namely, many postpartum depressions remain unnoticed and untreated by doctors. The aim of this research was to examine the occurrence of postpartum depression in mothers up to the first year of the child's life in Primorsko-goranska County. 90 women (mothers) who had a child up to one year of age participated in the research. The relationship between the age of the child, the quality of the marital relationship, socioeconomic status, planned pregnancy and the occurrence of a stressful event with the onset of postpartum depression was examined. The results of the regression analysis also showed a statistically significant functional connection with the mentioned variables. The research was conducted using an anonymous survey on the occurrence of postpartum depression, via social networks. The obtained results indicate that postpartum depression can occur regardless of the age of the child and the planning of the pregnancy. The results tell us that the factor for the occurrence of postpartum depression is the quality of the marital relationship, socioeconomic status and the connection with a stressful event after the birth of a child. In the EPDS questionnaire, 46.67% of respondents have 10 or more points and show the possibility of postpartum depression, while 24.43% have 13 or more points, where the respondents probably suffer from postpartum depression. In order to recognize the symptoms of postpartum depression on time, the use of the Edinburgh Postnatal Depression Scale can be recommended.