The purpose of this study was to compare the percent time children with and without autism spectrum disorders (ASD) spent in moderate-to-vigorous physical activity (MVPA) during inclusive recess settings. Forty-eight children (ASD, 23 boys and 1 girl; Non-ASD, 23 boys and 1 girl) aged 7-12 years from 14 schools had their physical activity during recess quantified using a uniaxial accelerometer over a 5-day in school period. Children with ASD were less active during overall recess, lunchtime, first and second morning recess compared to those without disabilities (p < .01). All children in this study did not achieve 40% of recess time in physical activity, suggesting that interventions for increasing physical activity of children during inclusive recess settings are warranted.