We explored the relationship between acculturation and beliefs, attitudes, norms, and intention regarding oral contraceptive use among Korean immigrant women using acculturation and the theory of reasoned action (TRA) as the frameworks. A total of 1,494 Korean surname-based telephone numbers were sampled in New York City. One hundred forty-five Korean immigrant women completed a telephone survey. The findings support the assumption that acculturation affects intention to use oral contraceptives indirectly only through one or more of the TRA components. Acculturation could function as an antecedent to changes in beliefs, attitudes, norms, and intention in this population. Acculturation assessment tools could provide health professionals insight into how to better approach this population on such culturally sensitive health issues as contraceptive use.