objective: to estimate the prevalence of unplanned pregnancy and verify its association with sociodemographic factors in women enrolled in the fhs - family health strategy, in suburban sanitary salvador - ba. methods: a quantitative, exploratory, cross-sectional study, with a sample of 191 pregnant women, stratified by health units. the pregnancy was categorized into planned and unplanned, and sociodemographic characteristics constituted the independent variables. the magnitude of the associations was obtained by the ratio of prevalence and confidence intervals (95%), estimated by poisson regression, with the level of statistical significance, 5% (p < 0.05). results: the prevalence of unplanned pregnancy was 66.5%; age, marital status, occupational situation, and income exhibited statistically significant proportional differences with regard to type of pregnancy. there was a positive association between age, marital status and occupation with unplanned pregnancy. conclusions: the results reaffirm the association between unplanned pregnancy and socioeconomic conditions, and the esf appears to have been effective in ensuring the reproductive rights of women.