Objectives: This study on the epidemiology of lung cancer in Hanoi from 2015 to 2019 offered crucial details on the situation of the disease and epidemiological characteristics of lung cancer. Methods: Data was collected retrospectively in a descriptive study with analysis. Results: In Hanoi, 7389 new cases of lung cancer were diagnosed between 2015 and 2019. The highest age group was 60-69 years old, accounting for 36.2% of the population; the crude incidence rate was 20.3/100000; the age-standardized incidence rate was 19.6/100000 (with 31.6/100000 for men and 9.7/100000 for women); and the age-standardized incidence rate in the inner city is lower (13.7/100000) than that in the suburban area (19.4/100000). Conclusions: Lung cancer was still a public health issue that required special attention. Effective tobacco control initiatives, early detection screening, and improved treatment quality were the top priorities for reducing the negative effects of lung cancer in the community. Keywords: Incidence rate, lung cancer, Hanoi