About 12% of Americans aged 14 to 49 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. Globally, the numbers are even higher: an estimated 520 million people were living with genital HSV-2 in 2020, or about 13% of everyone aged 15 to 49 worldwide.
U.S. Prevalence by the Numbers
The most recent national survey data, collected by the CDC during 2015–2016, found HSV-2 prevalence of 11.9% among people aged 14 to 49. On top of that, nearly half the same age group (47.8%) carried HSV-1, the virus traditionally linked to oral herpes. HSV-1 can also cause genital infections when transmitted through oral sex, which means the true number of people with genital herpes of any type is higher than the HSV-2 figure alone suggests.
In 2018, an estimated 572,000 new genital herpes infections occurred in the U.S. among people in that 14-to-49 age range. That’s more than 1,500 new infections every day.
Who Is Most Affected
Genital herpes does not spread evenly across the population. Women carry it at nearly double the rate of men: 15.9% compared to 8.2%. This gap is largely biological. The virus transmits more easily from men to women during sex because mucosal tissue in the genital area is more exposed.
Racial disparities are even more pronounced. Among non-Hispanic Black Americans, HSV-2 prevalence reaches 34.6%, roughly one in three people. Non-Hispanic white Americans and Mexican Americans have similar rates at around 8–9%, while non-Hispanic Asian Americans have the lowest prevalence at 3.8%. These differences reflect broader patterns of health inequity, including disparities in access to sexual health education and care, rather than any inherent biological susceptibility.
Most People Don’t Know They Have It
The single most important thing to understand about these numbers is that the majority of people with genital herpes have never been diagnosed. Most HSV infections are either completely asymptomatic or produce symptoms so mild they get mistaken for something else, like an ingrown hair or a yeast infection. Of the estimated 520 million people worldwide with genital HSV-2, only about 205 million experienced even one noticeable symptomatic episode in 2020. That means roughly 60% of people carrying the virus had no recognized outbreaks at all.
This matters for two reasons. First, standard STI panels typically do not include herpes blood tests, so most carriers are never tested. Second, people without symptoms can still transmit the virus through “asymptomatic shedding,” periods when the virus is active on the skin’s surface without causing visible sores. The combination of widespread infection, minimal symptoms, and infrequent testing is exactly why herpes remains so common.
Global Prevalence
The World Health Organization estimated that over one in five adults worldwide had a genital herpes infection as of 2020, when accounting for both HSV-1 and HSV-2 genital cases. For HSV-2 specifically, the global prevalence sits at about 13% of people aged 15 to 49. Rates vary significantly by region, with sub-Saharan Africa carrying the highest burden and parts of East Asia reporting the lowest.
Why the Real Number Is Higher Than 12%
The commonly cited 12% figure refers only to HSV-2 in Americans aged 14 to 49. It excludes several groups that would push the percentage higher. People over 49 have higher rates because the virus accumulates in a population over time (once you have it, you have it for life). And it doesn’t capture genital infections caused by HSV-1, which has become an increasingly common cause of genital herpes, particularly among young adults. As fewer people acquire HSV-1 through childhood exposure (from family kisses, shared cups), more encounter it for the first time through oral sex as teenagers or adults, resulting in a genital rather than oral infection.
When all of these factors are combined, the true percentage of adults who have or have had a genital herpes infection is considerably higher than one in eight. The WHO’s estimate that more than one in five adults globally has genital herpes of some type is the most complete picture currently available.