Background Stroke and other neurologic complications are rare in pediatric type 1 diabetes mellitus (T1DM) without severe diabetic ketoacidosis (DKA) or poor glycemic control. Case presentation A previously healthy, 10-year-old female presented with acute thalamic stroke, non-acidotic new T1DM diagnosis and negative hypercoagulopathy workup. She received routine insulin therapy and aspirin, and returned to neurologic baseline within a year without stroke recurrence. Conclusions The contribution of non-acidotic hyperglycemia to stroke risk is better described in adults. Even though unable to prove causality, this case should at least raise awareness of the possible association of pediatric new-onset diabetes and stroke for optimal outcomes.