Lung cancer remains the largest cause of cancer death worldwide. Surgical resection remains the best chance of cure, but only 20% of patients are eligible for this treatment. Traditionally, the remaining patients have been managed with combinations of radiotherapy and chemotherapy; however, outcomes have been poor. Recently, techniques such as stereotactic radiotherapy and thermal ablation have shown promise with outcomes rivalling surgery. This review discusses the principles, technique, outcomes, and complications of the 3 most utilized thermal ablative techniques (radiofrequency ablation, microwave ablation, and cryoablation) for lung tumors.