Ischemic stroke patients show alterations in peripheral leukocyte counts that may result from the sterile inflammation response as well as the occurrence of early infections. We here aimed to determine whether alterations of circulating leukocytes in acute ischemic stroke are associated with long-term functional outcome and hemorrhagic complications, independently of the occurrence of infections. Blood laboratory values of patients with acute ischemic stroke, presenting within 4.5 h from symptom onset, were collected. Leukocyte subsets were analyzed in relation to 3-month functional outcome, mortality, and parenchymal hemorrhagic transformation (PH). A multivariable logistic regression analysis, considering the occurrence of early post-stroke infections, was performed for each outcome measure. Five-hundred-ten patients were included in the study. Independently of infections, good functional outcome was associated with a lower neutrophil to lymphocyte ratio (NL-R, OR 0.906 95% CI 0.822-0.998), a higher lymphocyte count (OR 1.547 95% CI 1.051-2.277), a higher eosinophil count (OR 1.027 95% CI 1.007-1.048), and a higher eosinophil to leukocyte ratio (EoLeu-R, OR 1.240 95% CI 1.071-1.436) at admission. Death within 3 months was associated with higher NL-R (OR 1.103 95% CI 1.032-1.179) as well as with lower eosinophil counts (OR 0.909 95% CI 0.827-0.999). Patients developing parenchymal hemorrhagic transformation had higher neutrophil counts (OR 1.420 95% CI 1.197-1.684) as well as a higher NL-R (OR 1.192 95% IC 1.088-1.305). Leukocyte subtype profiles in the acute phase of ischemic stroke represent a predictor of outcome independently of infections. Stroke-evoked sterile inflammation is a pathophysiological relevant mechanism that deserves further investigation.