The crude density of the northern part of the West Bank according to the 1997 census was 321.6 persons/Km2. This density varies from one district to another, while it is the lowest in Tubas District, it was the highest in Tulkarem District. Measures of population concentration show that there is a kind of regularity of population distribution in the northern part of the West Bank. Many physical, human, and economic factors affected the population distribution in the study area. 31 variables that may affect the shape of the population distribution were considered in this study. By using stepwise regression, the factors of: local topography, number of artesian wells, area cultivated with fruit tress (including olive tress), percentage of urban population and the annual average of rainfall explained most of the differences in the population distribution in the study area.