This study aimed to examine dietary nutrient intake and parental perspectives on nutrition in a diverse sample (e.g., age, ethnicity) of children with autism spectrum disorder (ASD) in the U.S. state of Florida. Forty-one parents of children with ASD (ages 2-17 years) completed a food record, and 25 of these parents participated in semi-structured focus groups. Children with ASD were significantly less likely to meet the recommendation for calcium compared with children in the general population (66.7% vs. 53.1%, odds ratio [OR] = 3.1; p = 0.002). Riboflavin and vitamin B12 intakes were significantly lower among children with ASD (p < 0.001). Focus group results indicated parental concerns on children's diet and mealtime behaviors. Parents discussed the quality of existing nutrition information to be a concern, reported wanting intervention content on effective feeding strategies and healthy eating specific to children with ASD, and wanted to receive a nutrition intervention in multiple delivery formats. These findings will be utilized in developing a nutrition education intervention.