Smokeless tobacco and areca nut are popular with South Asians and South Asian immigrants, most commonly used as paan and gutka. Their regular use leads to oral cancer. The South Asian community in the U.S. is rapidly growing, where paan and gutka are readily available. The study was the first exploration of the migration of the paan and gutka habits, and their use in the U.S.A 108-item questionnaire on paan and gutka usage and beliefs was administered to 138 first-generation Bangladeshi and Indian-Gujarati immigrant adults at community sites in the New York metropolitan area. Forty-five percent Indian-Gujaratis reported ever-regular paan use; of which 5% are current users. Thirty-one percent reported ever-regular gutka use; of which 77% are current users. Thirty-five percent Bangladeshis reported ever-regular paan use; of which 70% arc current users. Nine percent reported ever-regular gutka use; of which 67% are current users. Bangladeshis are more likely to identify paan as causing oral cancer. Indian-Gujaratis are more likely to identify gutka as causing oral cancer.Between the two communities, there were significant differences in paan and gutfca usage, migration effects, and oral career risk perception. There is a need for comprehensive migration studies on the determinants of usage, and for community-specific interventions for these carcinogenic products.