Background Early initiation breastfeeding (EIBF) is a sign of good health for both the mother and the newborn baby. The objective of this study was to estimate the prevalence of EIBF among mothers in Bangladesh and to identify its associated factors.

Methods The study used the most recent Bangladesh Demographic and Health Survey 2017–2018 data. A total of 4776 (weighted) respondents were included in the final analysis. The association between the outcome and the independent variables was determined using multilevel (mixed effects) logistic regression analysis.

Results The overall weighted prevalence of EIBF among Bangladeshi mothers was 61.19% (confidence interval [CI] 59.80 to 62.56). The study shows that non-poor wealth status (adjusted odds ratio [AOR] 0.81 [95% CI 0.68 to 0.95]), institutional delivery (AOR 0.77 [95% CI 0.61 to 0.96]) and caesarean delivery (AOR 0.31 [95% CI 0.26 to 0.38]) were associated with the lower odds of EIBF. Mother's secondary education (AOR 1.34 [95% CI 1.01 to 1.83]), at least four antenatal care visits (AOR 1.36 [95% CI 1.04 to 1.53]), normal birthweight (AOR 1.42 [95% CI 1.09 to 1.85]) and placed on mother's chest and bare skin after birth (AOR 1.33 [95% CI 1.11 to 1.60]) were associated with higher odds of EIBF.

Conclusion In order to enhance EIBF in Bangladesh, health professionals should emphasise skin-to-skin contact after delivery.