Epidemiology, How Common Is Crohn’s Disease?
Crohn’s disease (CD) is the most common inflammatory bowel disease (IBD) among children and adolescents.
How Common Is Crohn’s?
adults in the U.S. live with Crohn’s disease (prevalence)
people under 20 in the U.S. live with IBD (prevalence), about 6 in 10 of them have Crohn’s
adults in the U.S. live with any form of IBD (prevalence)
Sources: CDC/NCHS, 2023–2024 · Crohn’s & Colitis Foundation, 2024
Because IBDs are chronic, they need long-term care, which often includes medications and the occasional hospital stay.
Numbers are going up, and that’s partly good news
The incidence (number of new cases each year) is rising. Some of that is due to better awareness and earlier diagnosis, which means people are getting help sooner.
Where Crohn’s Is Most Common
A large study across 48 countries looked at how often IBDs occur in young people. Rates vary a lot by region:
Crohn’s is also more common in developed countries, in northern climates, and in urban areas compared with rural ones.
When Does Crohn’s Usually Start?
Most people are diagnosed with Crohn’s in their 20s, but it can show up at any age. About 10 to 20% of people with IBD are diagnosed before they turn 18, depending on the study, which is why chapters like this one matter for teens.
Sources: ECCO-ESPGHAN, 2021 · Clinical and Experimental Gastroenterology, 2025
Two groups of early-onset patients
When Crohn’s starts before adulthood, doctors usually look at two age groups, because the patterns look a bit different:
👶 Under 6 years old
More likely to have Crohn’s in the colon. This group sometimes responds differently to standard treatments, so care plans are tailored carefully.
🧒 Over 6 years old
Patterns look similar to adults, and medication usually works well for managing symptoms.
How Common Is Crohn’s for Different People?
Gender
In children and teens, Crohn’s seems to affect boys a bit more often. From about the mid-20s onwards, more women are diagnosed than men.
Race & ethnicity
Historically, Crohn’s has been most common among White people.
More recently, incidence is rising among Black people in the U.S., Canada, and the U.K. In Black patients, Crohn’s more often affects the colon and stomach (and less often the small intestines), and extraintestinal complications, symptoms outside the gut, may be more common.