We determined the clinical and microbiologic characteristics of community-acquired Acinetobacter baumannii bacteremia in 19 adult patients. We found that malignancy was the most frequent underlying disease. The overall mortality rate was 58%. All 14 available isolates were identified as genomic species 2 (A. baumannii) by 16S ribosomal DNA sequencing and were found to be genetically distinct by pulsed-field gel electrophoresis.