Objective: Migraine is a risk factor for slower recovery from sport-related concussion. We examined comorbidities and baseline test results in athletes with self-reported migraine histories. Method: Participants were 28,780 adolescent student athletes from Maine who completed baseline preseason testing with ImPACT® between 2009 and 2013. They had no history of concussion in the past 6 months Results: Treatment for migraine was reported by 7.2% of boys and 7.4% of girls. Those with a migraine history, compared to those without a migraine history, were more likely to report a history of attention-deficit hyperactivity disorder (ADHD; 8.9% versus 5.8%, p < .009), learning disability (6.1% versus 3.4%, p < .001), other academic difficulties (9.8% versus 4.4%, p < .001), and prior treatment for mental health (15.4% versus 5.6%, p < .001) or substance abuse (1.5% versus 0.4%, p < .001). Students with a migraine history were more likely to report a history of one or more prior concussions (28.2% versus 14.4%, p < .001). The groups did not differ on the four primary ImPACT® neurocognitive composite scores. Those with a migraine history reported more symptoms on the Post-Concussion Scale (Cohen's d = 0.58). Conclusion: Student athletes with pre-existing migraines are statistically more likely to have other comorbidities, such as ADHD, learning problems, mental health problems, and past concussions. They did not perform more poorly on cognitive testing. They also report more baseline preseason symptoms than athletes without migraines (e.g., headaches, fatigue, sleep difficulty, sensitivity to light and noise, balance problems, dizziness, cognitive difficulties, and emotional symptoms).