This study determined the prevalence of complications related to early weight bearing and the factors associated with time to healing in children after a complete tibial shaft fracture. Radiographs and medical records were reviewed from patients with unilateral, closed, complete tibial shaft fractures who were treated nonoperatively with a long leg cast. There were 55 males (68.8%) and 25 females (31.2%) with a mean ± SD age of 6.0 ± 4.0 years (range 1-16). There were few complications (2.5%) and patients healed faster if they bore weight earlier (0.3 days faster for each day earlier to weight bearing, P = 0.02), were younger (2.3 days faster per year younger, P < 0.001), were female (2.7 days faster than males, P = 0.02), or did not have a closed reduction (3.8 days faster, P = 0.002) (R = 0.63). Time to weight bearing after complete tibial shaft fracture was not associated with an increased risk of complications. Earlier weight bearing was associated with a shorter time to healing. This study provides support for treatment with early weight bearing in children with closed, complete tibial shaft fractures.