There are relations that exist between crime and demography. In this work concepts of demography are studied and their effect on population. Demography is the study of the statistics of population and in particular some characteristics such as size, density and distribution. These changes in the population dynamics are studied in relation to the factors such as birth migration, aging and death. The demographic analysis can be confined to different target groups and environments. This criteria applied during such analysis may be on basis of ethnicity, nationality and education. Demography is closely associated to sociology. In demography there is the formal demography which limits the analysis to population processes. On the other hand, in statistical study of human population under social demography relationships in social, economic, biology and culture are also looked at and the influence that they have on the population.