['Limited studies have examined ethnic variation in breastfeeding and complementary feeding practices in developing countries. This study investigated ethnic variation in feeding practices in mothers with children 0-23 months old in Vietnam.', 'We used data on 1875 women who came from the ethnic majority, Kinh (n\u2009=\u2009989, randomly sampled from 9875 surveyed Kinh mothers, 10\xa0% from each province) and three ethnic minorities: E De-Mnong (n\u2009=\u2009309), Thai-Muong (n\u2009=\u2009229) and Tay-Nung (n\u2009=\u2009348). Ethnic minorities were compared with the Kinh group using logistic regression model.', 'Prevalence of breastfeeding initiation within an hour of birth was 69\xa0% in Thai-Muong, but ~50\xa0% in other ethnicities. In logistic regression, the prevalence of breastfeeding within one hour was lower in Tay-Nung (OR: 0.54; 95\xa0% CI: 0.38, 0.77) than the majority Kinh. Prevalence of exclusive breastfeeding under 6\xa0months was 18, 10, 17, and 33\xa0% in Kinh, Thai-Muong, Tay-Nung, and E De-Mnong, respectively; compared to the majority Kinh, the prevalence was lower in Thai-Muong (OR: 0.42; 95\xa0% CI: 0.25, 0.71) and higher in E De-Mnong (OR: 1.99; 95\xa0% CI: 1.04, 3.82). Overall prevalence of bottle feeding in Thai-Muong and E De-Mnong (~20\xa0%) was lower than in Kinh (~33\xa0%): Thai-Muong (OR: 0.50; 95\xa0% CI: 0.37, 0.68) and E De-Mnong (OR: 0.69; 95\xa0% CI: 0.50, 0.95). Compared with Kinh (75\xa0%), fewer ethnic minority children received minimum acceptable diets (33\xa0% in Thai-Muong, 46\xa0% in E De-Mnong, and 52\xa0% in Tay-Nung; P\u2009<\u20090.05). Prevalence of minimum acceptable diet (met both dietary frequency and diversity) was lower in Thai-Muong (OR: 0.23; 95\xa0% CI: 0.11, 0.46), Tay-Nung (OR: 0.52; 95\xa0% CI: 0.39, 0.69), and E De-Mnong (OR: 0.55; 95\xa0% CI: 0.33, 0.89) than the majority Kinh.'] Do infant and young child feeding practices differ by ethnicity of Vietnamese mothers?