Having short education or living without a partner negatively influences lung cancer survival and low social position has been associated with higher risk of advanced stage of the lung cancer at diagnosis. Disparities exists in both curative and palliative intended treatment, even adjusted for performance status and comorbidity. Differences in stage, treatment and comorbidity at diagnosis explain most of the social inequality in lung cancer survival. Age disparities in favor of younger lung cancer patients has also been found in several studies showing that older patients do not receive the most optimal treatment although age by itself do not worsen efficacy or tolerance to combined induction and definitive treatment, radiation therapy or concurrent chemoradiation. Taken together these findings indicate that in order to reduce social inequality in lung cancer survival not only early detection should be improved but also efforts to ensure optimal treatment among lung cancer patients of low social position are needed. Survival observed in the most advantaged group of lung cancer patients should set the target for what is achievable for all lung cancer patients in Denmark.