Objective: To describe acculturation, food patterns, overweight, and gender differences among Korean immigrants in the United States. Methods: A cross-sectional exploratory survey assessed acculturation, food frequencies, and weight status of 195 Korean immigrants. Results: Acculturated Korean immigrants (score greater than or equal to] 2.5) were more likely to consume both healthy and unhealthy US foods. Acculturation was not associated with overweight. Men were more likely to be acculturated (OR = 2.46; CI = 1.26-4.79) and overweight (OR = 5.08; CI = 2.37-10.90) than women. Moreover, overweight men reported more frequent consumption of fast foods, hot dogs (OR = 2.92;CI = 1.18-7.22), and tacos (OR = 4.12;CI = 1.60-10.62) than did nonoverweight men. Conclusion: Dietary interventions in Korean immigrants should take gender differences in acculturation and food patterns into account.