Kingella kingae is a rare human pathogen. Most reported infections are in children and involve endocardium, vascular space, and skeletal tissues. We report herein two cases of K. kingae infection recently seen in adults. Kingella kingae caused acute meningitis in a patient with sickle cell anemia and in the second patient with alcoholic liver disease, sepsis with a petechial rash. The clinical presentation due to K. kingae closely resembled that caused by related Neisseria genus.