About 12% of adults aged 14 to 49 in the United States have genital herpes caused by HSV-2, the virus most commonly associated with the condition. That translates to roughly one in eight people in that age range. When you factor in genital infections caused by HSV-1 (the virus traditionally linked to cold sores), the true number of people living with genital herpes is significantly higher.
U.S. Prevalence by the Numbers
The most comprehensive U.S. data comes from the CDC’s National Health and Nutrition Examination Survey covering 2015–2016. It found HSV-2 prevalence among people aged 14 to 49 was 11.9%, or 12.1% after adjusting for age distribution. That figure has actually dropped over time: in 1999–2000, it was 18.0%, meaning prevalence fell by nearly 6 percentage points over roughly 16 years.
New infections continue at a steady pace. The CDC estimates there were 572,000 new genital herpes infections in the U.S. in 2018 among people aged 14 to 49. Because herpes is a lifelong infection, those new cases add to a large existing pool of people already carrying the virus.
How Prevalence Changes With Age
Genital herpes becomes more common the older you get, simply because people accumulate more years of sexual exposure. Among U.S. teens aged 14 to 19, HSV-2 prevalence is very low at 0.8%. It climbs to 7.6% among 20- to 29-year-olds, 13.3% among 30- to 39-year-olds, and reaches 21.2% among those aged 40 to 49. That means roughly one in five Americans in their 40s carries HSV-2.
This steady climb is worth keeping in mind when interpreting the overall 12% figure. If you’re in your 40s, the prevalence among your peers is nearly double the national average. If you’re in your early 20s, it’s considerably lower.
Differences by Sex and Race
Women are nearly twice as likely as men to have HSV-2. Age-adjusted prevalence is 15.9% among women compared to 8.2% among men. This gap is partly biological: the virus transmits more easily from men to women during vaginal sex than the other way around.
Racial disparities are striking. Non-Hispanic Black Americans have the highest HSV-2 prevalence at 34.6%, while non-Hispanic Asian Americans have the lowest at 3.8%. These differences reflect complex patterns in sexual networks, access to healthcare, and socioeconomic factors rather than any biological susceptibility. They also mean the “one in eight” national average can be misleading depending on which community you belong to.
HSV-1 as a Growing Cause of Genital Herpes
The 12% figure only captures HSV-2. HSV-1, which most people think of as the cold sore virus, also causes a substantial share of genital infections. It spreads to the genitals through oral sex and has become an increasingly common cause of genital herpes, particularly among younger adults. The World Health Organization estimates that 376 million people worldwide had genital HSV-1 infections in 2020, on top of the 520 million with genital HSV-2.
Standard blood tests for HSV-1 can’t distinguish between an oral and genital infection, which makes it hard to pin down an exact prevalence rate for genital HSV-1 specifically. But clinicians report that HSV-1 now accounts for a large and growing proportion of first-episode genital herpes cases, especially in young women. One practical difference: genital HSV-1 tends to recur far less frequently than genital HSV-2. HSV-2 accounts for about 90% of symptomatic recurrent outbreaks.
Global Prevalence
Worldwide, about 13% of people aged 15 to 49 have HSV-2, totaling an estimated 520 million people as of 2020. When the WHO added genital HSV-1 infections into the picture, the combined total meant that over one in five adults globally had some form of genital herpes. Prevalence varies widely by region, with sub-Saharan Africa having the highest rates and East Asia the lowest.
Most People Don’t Know They Have It
One of the most important things to understand about these numbers is that the vast majority of people with genital herpes have never been diagnosed. Many have mild or no symptoms at all, or they mistake occasional symptoms for something else, like a yeast infection or ingrown hair. The CDC does not recommend routine herpes screening for the general population because blood tests can produce false positives and because a positive result in someone without symptoms often causes more psychological harm than medical benefit.
This means the people who do get diagnosed represent only a fraction of those actually infected. If you’ve tested positive, you’re far from alone, even though it can feel that way. The virus is common enough that most sexually active adults have been exposed to one or both types of herpes simplex virus at some point in their lives. Nearly half of U.S. adults aged 14 to 49 (47.8%) carry HSV-1, and about 12% carry HSV-2, with considerable overlap between the two groups.