Background: A substantial portion of the dental issues that patients bring to the hospital are caused by odontogenic infections. The present study was conducted to assess usefulness of ultrasonography as a diagnostic tool in the management of head and neck facial space infections. Materials & Methods: 104 patients with odontogenic infections of both genders were assessed clinically. The swelling was evaluated using a portable Acuson p50 ultrasound unit that produces high resolution images. Results: Out of 104 patients, males were 60 and females were 44. The maxilla was involved in 46 and mandible in 58 cases. Side was right in 42 and left in 62 cases. Tooth type was maxillary anterior in 23, maxillary posterior in 20, mandibular anterior in 25 and mandibular posterior in 36 cases. Clinical diagnosis was correctin 98 and incorrect in 6 cases. Ultrasound found to be correct in 102 and incorrect in 2 cases. The difference was significant (P< 0.05). Conclusion: Ultrasound is recommended as an adjunct to clinical examination in management of head and neck facial space infections.