Abstract: The subject of this research is the modern processes of marriage and divorce of the population. The article examines the main factors of marriage that significantly influence the demographic situation of the Northern underpopulated region. The author traces the course of such process in the Sakha Republic (Yakutia) in the XXI century, as well as analyzes the territorial differentiation of nuptiality. Special attention is given to the question of the stability of marriages. Based on the materials of sociological survey of the youth, the author examines the peculiarities of their relation to starting a family, official marriage registration, and civil marriage. The article applies typological method of analysis; type-forming indicators imply the direction and intensity of accession rate in the number of registered marriages and divorces that comprise the typology of Yakut districts. The author implements the method of questionnaire for determination of opinion of the youth on family and forms of marriage, as well as identifies noticeable quantitative differences of nuptiality in accordance with the groups of districts. Moreover, differences are noted not only over the whole observation period (2000 – 2015), but in the intermediate period as well. Among the factors of decline in marital activity of the population, a certain place belongs to the expansion of civil marriages. The main results of the survey of students demonstrate that modern youth clearly distinguish the forms of marriage. Thus, in their opinion, formal marriage focuses on the family, children, and civil – only on an individual. In the conditions of transformation of the place of family and marriage within the value system of society, this confrontation is likely to increase.