Epilepsy affects roughly 1 in 26 people in the United States at some point in their life

About 3.4 million Americans currently have epilepsy, including 3 million adults and 470,000 children. That means if you walk into a room of 25 people, statistically one of them has had or will have a seizure disorder. The number varies slightly year to year depending on how studies count people with newly diagnosed cases, but the range stays between 1 and 2 percent of the population.

Globally, the World Health Organization estimates that 50 million people have epilepsy. It is one of the most common neurological conditions worldwide, affecting people across all ages, races, and income levels. The condition does not discriminate—it shows up in children and older adults, in athletes and people with other health conditions, in wealthy countries and low-income ones.

Key Takeaways

  • About 1 in 26 Americans will develop epilepsy at some point, making it as common as diabetes or Alzheimer's disease.
  • Children and people over 65 have the highest rates of new seizure diagnoses, though epilepsy can start at any age.
  • Most people with epilepsy can control their seizures with medication, but about one-third have seizures that do not respond to standard treatment.
  • Epilepsy is more common in people with brain injuries, stroke, dementia, or a family history of seizures.

Who is most likely to develop epilepsy

Two age groups have the steepest risk: very young children and adults over 65. In children, seizures often start before age 5, though they can begin at any point during childhood. In older adults, the risk climbs sharply after 65, partly because stroke, dementia, and head injury become more common with age.

Certain conditions raise the risk significantly. People who have had a stroke, traumatic brain injury, or brain surgery are more likely to develop epilepsy later. So are people with Alzheimer's disease, other forms of dementia, or brain tumors. A family history of epilepsy also increases risk—if a parent or sibling has epilepsy, your own risk is higher than the general population.

Some people are born with conditions that make seizures more likely, such as cerebral palsy, autism spectrum disorder, or genetic syndromes. Uncontrolled high fevers in infancy can sometimes lead to febrile seizures, though most children who have febrile seizures do not go on to develop epilepsy.

How epilepsy rates differ by region and country

Epilepsy is more common in low- and middle-income countries than in wealthy ones, though the reasons are complex. Head injuries, infections, and lack of prenatal care all contribute to higher rates in some regions. In sub-Saharan Africa and Southeast Asia, the rates are notably higher than in North America or Western Europe.

Within the United States, rates vary slightly by state and region, though no single state has dramatically higher or lower numbers than others. Rural areas sometimes have lower rates of diagnosis simply because fewer neurologists practice there, not because fewer people actually have epilepsy. This means some people in rural regions may have undiagnosed seizure disorders.

How many people have seizures that medication cannot control

About two-thirds of people with epilepsy can control their seizures with anti-seizure medication. That means roughly one-third—around 1 million Americans—have what doctors call drug-resistant epilepsy. Their seizures continue despite trying multiple medications at the right doses.

For people with drug-resistant epilepsy, other treatments exist: surgery to remove the part of the brain causing seizures, vagus nerve stimulation, or newer devices like responsive neurostimulation. These options work for some people but not all. Research into new treatments continues, and the landscape of what is available changes over time.

Sudden Unexpected Nocturnal Death in Epilepsy (SUDEP)

SUDEP is a rare but real risk for people with epilepsy. It occurs when someone with epilepsy dies suddenly and unexpectedly, usually during sleep, with no other cause found. The exact mechanism is not fully understood, but it appears to involve seizures that affect breathing or heart rhythm.

SUDEP is uncommon—it accounts for a small fraction of deaths in people with epilepsy—but it is more likely in people whose seizures are not well controlled. People with generalized tonic-clonic seizures (the kind that involve the whole body) have higher risk than those with other seizure types. Keeping seizures controlled through medication, surgery, or other treatments reduces the risk.

How many children outgrow epilepsy

Many children with epilepsy eventually stop having seizures, either because the condition resolves on its own or because treatment works so well that seizures stop and medication can be withdrawn. The exact percentage depends on the type of epilepsy and when it started, but roughly 60 to 70 percent of children with newly diagnosed epilepsy become seizure-free.

Some types of childhood epilepsy are known to resolve by adolescence. Childhood Absence Epilepsy, for example, often stops by the teenage years. Other types are more persistent. A neurologist can discuss the outlook for a specific child's seizure type and what the chances are of outgrowing it.

Why epilepsy rates may seem to be rising

Epilepsy rates have not actually increased dramatically, but diagnosis has improved. Better imaging technology, more neurologists, and greater awareness mean more people are correctly identified as having epilepsy rather than being misdiagnosed or going undiagnosed. Older adults are also living longer, and since epilepsy risk rises with age, more older people are being diagnosed.

In addition, conditions that cause epilepsy—like stroke and dementia—are being diagnosed more often and more accurately. This means the people who develop epilepsy as a result are also being counted. The rise in numbers reflects better detection and an aging population more than a true increase in how often epilepsy occurs.

Frequently Asked Questions

Is epilepsy becoming more common?

Diagnosis rates have improved, and the population is aging, so more people are being identified with epilepsy. The actual occurrence of new cases has not risen dramatically. Better imaging, more neurologists, and increased awareness account for most of the apparent increase.

Can you catch epilepsy from someone else?

No. Epilepsy is not contagious. You cannot catch it from another person. It develops because of changes in the brain—from injury, infection, genetics, or causes that are sometimes unknown—but it is not spread from person to person.

Are some races or ethnicities more likely to have epilepsy?

Rates are fairly similar across racial and ethnic groups in the United States, though some studies show slightly higher rates in Black and Hispanic populations. This difference is thought to reflect differences in access to care and diagnosis rather than biological differences in who develops epilepsy.

If my parent has epilepsy, will I definitely get it?

No. Having a parent with epilepsy raises your risk compared to the general population, but most children of people with epilepsy do not develop the condition. Risk depends on the type of epilepsy, genetics, and other factors. A genetic counselor or neurologist can discuss your specific situation.

How many people with epilepsy live normal lifespans?

Most people with epilepsy have normal or near-normal lifespans. Life expectancy is shortened mainly in people with severe, uncontrolled seizures or certain genetic epilepsy syndromes. For people whose seizures are well managed, life expectancy is not significantly affected.