Lung cancer is the most common cancer in the world. In 2022, roughly 2.5 million people were diagnosed globally, making it the leading cause of both new cancer diagnoses and cancer deaths. In the United States alone, nearly 219,000 new cases were reported that same year. For the average American, the lifetime risk of being diagnosed with lung cancer is about 5.4%, or roughly 1 in 19 people.
Global and U.S. Numbers
Worldwide, lung cancer accounts for about 23.6 cases per 100,000 people each year. That rate varies dramatically by country, driven by differences in smoking prevalence, air pollution, and access to early detection. High-income countries with long histories of tobacco use tend to carry the heaviest burden, though rising pollution levels are shifting the landscape in parts of Asia and Africa.
In the United States, lung cancer is one of the most frequently diagnosed cancers. The 218,893 new cases reported in 2022 place it behind only breast cancer and prostate cancer in raw numbers. It remains the deadliest cancer by a wide margin: 131,584 Americans died from it in 2023, more than colon, breast, and prostate cancers combined.
Who Gets Lung Cancer
Lung cancer is overwhelmingly a disease of older adults. The median age at diagnosis is around 70, and cases under age 45 are uncommon. That said, younger diagnoses do happen, particularly among never-smokers who develop a subtype called adenocarcinoma, which has been rising in recent years and is linked in part to air pollution exposure.
Race and ethnicity play a measurable role in risk. Black Americans have historically had the highest incidence rate at about 76 per 100,000, followed by white Americans at roughly 70 per 100,000. American Indian and Alaska Native populations fall around 48 per 100,000, while Asian/Pacific Islander and Hispanic populations have lower rates, around 38 and 37 per 100,000 respectively. These gaps reflect a combination of smoking patterns, occupational exposures, and unequal access to healthcare.
Lung Cancer in People Who Never Smoked
Smoking is still the dominant risk factor, but 10% to 20% of people who develop lung cancer have never smoked. That’s a surprisingly large share. If lung cancer in never-smokers were counted as its own disease, it would rank among the top ten causes of cancer death in the U.S. The causes in this group include radon exposure, secondhand smoke, air pollution, and genetic factors that researchers are still working to fully map. A 2021 NIH study found that most lung cancers in never-smokers arise from natural mutations that accumulate in the body over time, rather than from a single identifiable environmental trigger.
Trends Over the Past Three Decades
The overall picture has been improving, but recent data introduces a complication. Between 1990 and 2019, age-adjusted lung cancer incidence in the U.S. dropped by about 23%, and mortality fell by nearly 27%. That decline tracks closely with falling smoking rates, which began dropping sharply in men in the 1980s and in women a decade later. The steepest improvements came after 2002, when incidence was falling by nearly 1.8% per year.
Since 2017, however, that downward trend has reversed slightly. Incidence rates for both men and women have ticked upward, and mortality rates have followed. Researchers aren’t entirely sure why. Possible explanations include increased detection through low-dose CT screening (which catches cases that previously went undiagnosed), rising adenocarcinoma rates linked to air pollution, and the lingering effects of vaping and other newer exposures that haven’t been studied long enough to draw firm conclusions.
Stage at Diagnosis and Survival
One of the reasons lung cancer is so deadly is that it’s often caught late. The lungs don’t have pain receptors in the same way other organs do, so tumors can grow for months or years before causing noticeable symptoms like a persistent cough, unexplained weight loss, or shortness of breath. By the time many patients are diagnosed, the cancer has already spread beyond the lungs.
When lung cancer is found while still localized (confined to the lung), five-year survival rates are significantly higher, often above 60%. Once it has spread to distant organs, that number drops below 10%. This gap is the core argument behind screening programs. Current guidelines recommend annual low-dose CT scans for adults aged 50 to 80 who have a 20-pack-year smoking history and currently smoke or quit within the past 15 years. Screening has been shown to reduce lung cancer deaths by catching tumors at earlier, more treatable stages.
How Your Personal Risk Compares
The 5.4% lifetime risk is an average across the entire population, including people who have never touched a cigarette. Your individual risk can be dramatically higher or lower depending on a few key factors. Smoking is by far the most important: a lifelong pack-a-day smoker faces a lung cancer risk roughly 15 to 30 times higher than a never-smoker. Quitting at any age reduces that risk, though it never fully returns to baseline.
Beyond smoking, the next biggest modifiable risk factor is radon, a naturally occurring radioactive gas that seeps into homes from the ground. Radon is the leading cause of lung cancer among never-smokers and the second leading cause overall. Testing your home is inexpensive and takes only a few days. Occupational exposure to asbestos, diesel exhaust, and certain metals also raises risk, particularly when combined with smoking. Family history of lung cancer roughly doubles your risk independent of smoking status, suggesting that inherited genetic variations affect how susceptible your lungs are to damage over time.