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Early detection and access to interventions for developmental delays in young children have been shown to improve health, social, and academic outcomes later in life. The purpose of this study is to examine the factors associated with caregivers' perception of child developmental concerns in low-income communities. A countywide survey was conducted in Los Angeles County (LAC), California, among 4,863 participating Special Supplemental Nutrition Program for Women, Infants, and Children (WIC) families with children ages 1-4 years. Proportional odds ordinal logistic regression was used to evaluate the association between the severity of reported developmental concerns and respondent characteristics. Results indicate that demographic characteristics, support systems, health care visits during COVID-19, and maternal symptoms of depression are associated with higher odds of reporting more severe developmental concerns among the WIC population. Advancing policies, programs, and research that aim to improve early detection and access to childhood professionals for all families will be essential to allow all children in low-income households to optimize their development.