How common is asthma?


More than 25 million Americans have asthma, but one-third of them are under 18. It can start anytime in your life. While that's not a disease that seems primarily associated with aging, the implications for aging are important.

In some ways, the final pathway for many diseases is in the lungs (if you live long enough, eventually, it's the lungs that will get you). Historically, in fact, pneumonia was called an old man's best friend, because it would allow you to slip into a coma and die peacefully when lack of oxygen would cause an abnormal and lethal heart rhythm.

YOU: The Owner's Manual, Updated and Expanded Edition: An Insider's Guide to the Body that Will Make You Healthier and Younger

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YOU: The Owner's Manual, Updated and Expanded Edition: An Insider's Guide to the Body that Will Make You Healthier and Younger

Between your full-length mirror and high-school biology class, you probably think you know a lot about the human body. While it's true that we live in an age when we're as obsessed with our bodies as...
Dr. Mehmet Oz, MD
Cardiologist (Heart Specialist)

The CDC reports that “the number of people diagnosed with asthma grew by 4.3 million from 2001 to 2009,” and those increasing numbers are especially apparent among African American children. Though the disease does afflict adults, it tends to first strike in childhood.

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According to the Centers for Disease Control (CDC), the prevalence of asthma is 8.2 percent of the population. That means that approximately 25 million people in the United States have asthma. Interestingly, the occurrence of asthma has steadily increased over the last several decades.

Asthma is one of the most common lifelong chronic diseases. There are almost 26 million Americans living with asthma.

In 2011, 18.9 million adults had asthma. That’s equal to one in 12 adults. 7.1 million children had asthma. That’s equal to one in 11 children.

In the past decade, the proportion of people with asthma in the United States grew by nearly 15 percent. In 2009, asthma caused:

  • 479,300 hospitalizations
  • 1.9 million emergency department visits
  • 8.9 million doctor visits

About nine people die from asthma each day. In 2010, 3,404 people died from asthma. More women die from asthma than men. Black Americans are two to three times more likely to die from asthma than any other racial or ethnic group.

The presence of the CDC logo and CDC content on this page should not be construed to imply endorsement by the U.S. government of any commercial products or services, or to replace the advice of a medical professional. The mark “CDC” is licensed under authority of the PHS.

Dr. Sam Pejham, MD

According to CDC:

  • Among children ages 5 to 17, asthma is the leading cause of school absences from a chronic illness. It accounts for an annual loss of more than 14 million school days per year (approximately 8 days for each student with asthma) and more hospitalizations than any other childhood disease. It is estimated that children with asthma spend nearly 8 million days per year restricted to bed. 
  • Nearly half (44 percent) of all asthma hospitalizations are for children. 
  • Asthma is the third-ranking cause of hospitalization children. 
  • The death rate for children under 19 years old has increased by nearly 80 percent since 1980. 
  • For adults, asthma is the fourth leading cause of work absenteeism and presenteeism, resulting in nearly 15 million missed or lost workdays each year, resulting in a total cost of nearly $3 billion in total lost productivity.
  • Senior citizens in the U.S. account for nearly 2,400 (60 percent) of the annual 4,000 deaths due to asthma. 
  • Asthma accounts for one-quarter of all emergency room visits in the U.S. each year, with 2 million emergency room visits. 
  • Each year, asthma accounts for more than 10 million outpatient visits and 500,000 hospitalizations. 
  • The average length of stay (LOS) for asthma hospitalizations is 3 days. 
  • African Americans are three times more likely to be hospitalized from asthma. 

Although asthma is difficult to diagnose in children under the age of five, experts believe it is fairly common—that nearly one in ten children in the United States have asthma. Over 22 million people in the United States have asthma. Asthma is more common in boys than girls and in women than men.

Continue Learning about Asthma



Asthma can be mild or severe, and is classified by how your breathing is affected. Most alarming are asthma attacks, episodes of severe coughing or wheezing where it is very hard to catch your breath; but asthma can also be a chro...

nic condition. Treatment is by anti-inflammatories and bronchodilators.

Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.