This study examines the relationship between family planning, perceived availability of contraceptives, and sociodemographic factors in rural Bangladesh. Data are from the 1990 KAP survey in the Matlab treatment and comparison areas, using a sample of about 8500 married women of reproductive age. The contraceptive prevalence rate was 57% in the treatment area but substantially lower in the comparison area where mainly traditional methods of family planning were used by women who did not know of a source of supply of contraceptives. Education has no effect on contraceptive use in the treatment area but in the comparison area, modest but consistent differentials in use by level of education were found. Number of living children is the best predictor for contraceptive use, followed by number of living sons, and the attitude of respondents and their husbands towards family planning.