This investigation assessed the frequency and predictors of condom use for HIV prevention among low-income women, and also explored the reasons for not always using condoms for HIV prevention and predictors of these reasons. Data were collected at 27 Women, Infants, and Children (WIC) program clinics in 21 Missouri counties. To be included in the study, women had to indicate a primary relationship with a male partner. Data were subjected to univariate and multivariate analyses. The sample (N = 2,010) was predominately White and ural, with median age being 25 years. Findings revealed that women sumeyed in the study were unlikely to use condoms, particularly those who were living in rural communities, who were pregnant, and who were either married or cohabiting with a primary male partner. The major reason for not using condoms was a belief that their male partner was not HIV infected, either because she believed he had been tested or because she simply believed that he was HIV negative. Other reasons for n...