The purpose of the present study is to build mathematical models to age structure for female population in rural area of Bangladesh during 1974–2001. For this, the secondary data of age structure for female population in rural area of Bangladesh has been taken from censuses of 1974, 1981, 1991 and 2001. It is seen that the pattern or shape of age structure follows negative exponential model. To clarify whether these are valid or not, the model validation technique, cross-validity prediction power (CVPP), is applied to these models.