Prevalence and Determinants of Undernutrition Among Children Under Five in Coastal Bangladesh: A Community‐Based Study

upazila of Khulna district, between July and October 2024. Undernutrition in children was assessed using World Health Organization (WHO) standards for stunting, wasting, and underweight. Findings revealed high levels of undernutrition prevalence among children under five, with 56.3% severe stunting and 33.3% moderate stunting, 16.4% severe wasting and 40.5% moderate wasting, and 28.7% severe underweight and 59.2% moderate underweight, respectively. Multivariate analyses demonstrated that stunting was significantly associated with child age, birth weight, caregivers' occupation and mass media exposure, education of the household head, household food insecurity, vulnerability, and membership of non-governmental organization (NGO). Wasting prevalence was influenced by child age and sex, exclusive breastfeeding, feeding practices, caregivers' education, occupation, income, religion, and mass media exposure, household vulnerability, NGO membership, and place of residence. Underweight prevalence was primarily associated with child age, sex, birth weight, caregivers' income, and exposure to natural disasters. This study emphasizes the need for integrated, multi-level strategies to address child undernutrition. Local actions should prioritize young and low-birth-weight children through improved feeding practices, maternal education, and livelihood support in disaster-prone areas, while national policies must embed nutrition within health, poverty alleviation, and social protection programs. Globally, climate-resilient and context-specific nutrition policies, supported by WHO, United Nations Children's Fund (UNICEF), and World Food Programme (WFP), are vital to ensuring sustainable and equitable child health outcomes.