The aim of this study is to document the clinical characteristics and outcomes of Acinetobacter baumannii infections in pediatric patients in a pediatric intensive care unit (PICU) in Turkey. The ages ranged from 1 month to 16 years with a mean age of 55.5 months, and the male-to-female ratio was 1:1.5. Ventilator-associated pneumonia (10 patients) was the leading diagnosis, followed by catheter-related blood stream infection (4 patients), and bacteremia and ventilator-associated pneumonia associated with meningitis (1 patient) due to A. baumannii. Mechanical ventilation (93.3%), central venous catheter (73.3%), urinary catheter (93.3%), and broad spectrum antibiotic usage (80%) were the frequently seen risk factors. Neuromuscular (40%) and malignant (26.7%) disorders were the most common underlying diseases. Nosocomial A. baumannii is commonly multidrug-resistant, prolongs the length of stay in the PICU and increases the mortality rates in pediatric critical care.