Summary: Background: Family based treatment is an effective, multipronged approach to address obesity as it plagues families. Objective: To investigate the relationships among sociodemographic characteristics (e.g., education and income), body mass index (BMI) and race/ethnicity with readiness to change for parents enrolled in the Primary care pediatrics, Learning, Activity and Nutrition (PLAN) study. Methods: Multivariate linear regressions tested two hypotheses: (1) White parents will have higher levels of baseline readiness to change, when compared to Black parents; (2) parents with higher income and education will have higher levels of readiness to change at baseline. Results: A positive relationship exists between baseline parent BMI and readiness to change (Pearson correlation, 0.09, p < 0.05); statistically significant relationships exist between parent education level (−0.14, p < 0.05), income (0.04, p < 0.05) and readiness to change. Additionally, a statistically significant relationship exists, with both White (β, −0.10, p < 0.05), and Other, non‐Hispanic (−0.10, p < 0.05) parents exhibiting lower readiness to change than Black, non‐Hispanic parents. Child data did not indicate significant relationships between race/ethnicity and readiness to change. Conclusions: Results demonstrate that investigators should consider sociodemographic characteristic factors and different levels of readiness to change in participants enrolling in obesity interventions. [ABSTRACT FROM AUTHOR]