Objective: To examine the joint association of sleep duration and screen time (ST) on overweight (including obesity) in low-income 8-12 years old children from Grand Rapids, Michigan. Methods: Participants included 237 third-through fifth-grade children. Sleep duration and daily ST were determined via self-report and classified as meeting or not meeting recommendations. Odds of overweight in each group were compared using logistic regression. Results: 47% of subjects were at least overweight, 74% did not meet ST recommendations, and 52% slept <10 h per night. Compared to children meeting recommendations for sleep and ST, the odds of overweight were similar among those meeting only one recommendation (sleep or ST), and among those meeting neither sleep nor ST recommendations. Conclusions: Results indicate that there is a lack of association between ST and sleep with overweight in this sample.