Ludwig’s angina is a severe, diffuse, rapidly progressive cellulitis of the sublingual and submandibular spaces, which usually develops from a preceding odontogenic infection. Imaging is frequently obtained on patients with the condition in order to assess the extent of the cellulitis, to localize drainable fluid collections and soft tissue gas, and to identify complications such as airway narrowing or mediastinal extension. Although the incidence and mortality associated with Ludwig’s angina has declined dramatically with the introduction of antibiotics, it remains a serious and potentially life-threatening condition that requires prompt diagnosis and management to avoid serious morbidity or death.