During the years 1981 to 1985, every single death and neoplastic illness in the province of Soria was recorded, and tabulated in relation to age, sex, location, and place of residence. Adjusted Rates (Direct method) were obtained for all locations, both in mortality and in incidence, as well as their Standard Errors. The deceased and the neoplastically ill were grouped in areas--Urban an Rural--in order to establish risk differences in both areas, the intervals of confidence being established according to the Miettinem method. The neoplastic risk is always higher in males, both incidence and Global Mortality being statistically significant (p less than 0.01), as well as most of the locations. Gastric tumors have the highest rate of incidence (global and in males) and mortality (global and in both sexes), with higher presence in rural areas than in urban ones (p less than 0.05). On the other hand, in males, there is a higher incidence in urban areas of Lung Tumors (p less than 0.01) and Larynx (p less than 0.05). The latter, in males, and in the bladder in both sexes, have the highest survival ratio (Standard rate of incidence/Standard rate of mortality).