On the basis of 1212 questionnaires filled up by women of postreproductive age living in five districts of the Republic of Tatarstan (Arsky, Atninsky, Kukmorsky, Buinsky, and Drozhzhanovsky), the basic reproductive characteristics and Crow's index and its components have been calculated. The rural population is characterized by expanded reproduction with a mean sibship size of 2.68; in district administrative centers, there is only simple reproduction. Crow's index and its components for the rural Tatar population are Im = 0.026, If = 0.172, Itot = 0.202. Graphic analysis of the mutual positions of some populations studied has been carried out.