Climate migrants and their food accessibility are a pressing issue in Bangladesh that has not been adequately addressed in previous studies. This research aimed to examine the food security status and its associated drivers among climate migrant households' residing in urban informal settlements in Khulna city. This study was conducted in three selected wards (12, 21, and 31) known for their urban informal settlements and high concentrations of climate migrants. Data were collected on socioeconomic, demographic, COVID‐19 impacts, and the Household Food Insecurity Access Scale using an interview schedule. Descriptive (mean, standard deviation, and percentage) and inferential statistics (chi‐square test and binary logit model) were used to analyze the data. The study found a large portion of households to be food insecure (83.3%). Several socio‐demographic and economic issues, including the household head's education, occupation, and health, the number of working members, monthly income, savings, debt, and access to a safety net, were identified as significant drivers of food insecurity. Moreover, COVID‐19 impacts, considering loss of employment, income, and savings, shortages of daily needs, and price hikes on food items, were identified as the significant contributors to food insecurity. Responsible stakeholders may utilize the outcomes of this study to combat food insecurity and hunger among climate migrants residing in urban informal settlements through necessary policy measures.