Who Is Most Likely to Get OCD?

By Justin La Rose, RP, M.Psy · Registered Psychotherapist (CRPO) · Clinical Director, The OCD Clinic

Evidence last reviewed: October 2026

The people most likely to get OCD are those with a close relative who has it, and OCD usually starts in childhood or early adulthood. Still, almost anyone can develop it. In a large US survey, about 2 in 100 adults had OCD at some point in life, and about 1 in 100 in a given year (Ruscio, 2010).

The short answer

  • How common OCD is: About 2.3% of US adults meet criteria for OCD at some point in life, and 1.2% in a given year, according to the National Comorbidity Survey Replication (Ruscio, 2010).
  • Symptoms are far more common than the disorder: More than a quarter of adults in the same survey reported obsessions or compulsions at some point in life (Ruscio, 2010).
  • Family history: OCD clusters in families, and a large family study estimated its heritability at about 47%, with no measurable effect of shared family environment (Mataix-Cols, 2013).
  • Two onset windows: OCD tends to begin either around age 11 or around age 23, and about three in four cases are early-onset, according to a review by Taylor (2011).
  • Often alongside other conditions: OCD often occurs alongside anxiety and mood disorders, according to the same US survey (Ruscio, 2010).

Does OCD run in families?

Yes, OCD clusters in families, and most of that family risk appears to be genetic rather than learned at home. That doesn’t make it destiny. It means the vulnerability can be inherited. There’s no evidence that parenting style alone causes OCD. If you want the longer version, see whether you’re born with OCD and why some people get OCD.

What kind of person tends to develop OCD?

In my practice, OCD tends to take hold in people who care a great deal about doing right and being safe: conscientious, responsible, morally serious and sensitive to uncertainty. Then it turns exactly that care against them. It’s like a roof: show me the strongest part of the roof, and I can show you where the weakest part is.

That’s why the shame lands so hard. OCD aims at exactly what you value, whether that’s your faith, as in scrupulosity, or the people you love, as in harm OCD. More on that in why shame keeps OCD hidden.

Raises the oddsDoesn’t predict OCD
A close relative with OCD (Mataix-Cols, 2013)Character or willpower
Being in one of the onset windows (Taylor, 2011)Parenting style on its own
A stressful period, in someone already vulnerableAn occasional strange intrusive thought

At what age are you most likely to get OCD?

OCD most often starts in one of two windows: around age 11, or in the early twenties around 23 (Taylor, 2011). It can begin in early childhood, and it can also emerge later in adulthood, often after a stressful period, a major life change, illness, or pregnancy and new parenthood, as in postpartum OCD. Stress doesn’t cause OCD, but in someone already vulnerable it can set it off. More on timing in what age OCD usually starts.

Whatever your fears are about, the treatment is the same: Exposure and Response Prevention (ERP).

Frequently asked questions

If my parent has OCD, will I get it?

Not necessarily. Having a close relative with OCD raises the odds, and family risk is largely genetic (Mataix-Cols, 2013). Raised odds aren’t a forecast for any one person.

Can you develop OCD as an adult?

Yes. One of the two common onset windows is the early twenties, around 23 (Taylor, 2011), and OCD can also start later. In my practice, a later start often follows a stressful period or a big life change, like a new baby.

Can children get OCD?

Yes. The earlier of the two common onset windows centres on about age 11, and about three in four cases fall in that early-onset group (Taylor, 2011). It can begin even younger.

Where can you go deeper?

If you're experiencing these symptoms, evidence-based treatment can help. We treat OCD, and only OCD, with Exposure and Response Prevention (ERP).

Book a Free Consultation

How we researched this page

This page draws on the National Comorbidity Survey Replication (Ruscio et al., 2010), a population family and twin study by Mataix-Cols and colleagues (2013) and Taylor’s 2011 review of age at onset, alongside what I see in my practice. The prevalence figures come from US adults, the heritability estimate comes from one national population, and the onset windows pool clinical samples, so none of them can tell you whether you will develop OCD. The temperament described here is clinical observation, not a research finding.

A note on my perspective

I run a private clinic that treats OCD with ERP, and I'm paid when people book with us. Read what I write with that in mind. Public and lower-cost routes exist too, and the Ontario OCD treatment guide lays them out next to ours.

About the author

Justin La Rose, RP, M.Psy is a Registered Psychotherapist with the College of Registered Psychotherapists of Ontario (CRPO) and Clinical Director of The OCD Clinic in Toronto. He has worked in mental health for more than 25 years and treats OCD with Exposure and Response Prevention (ERP). You can confirm his registration on the CRPO public register.

Client stories on this site are composites, with names and identifying details changed. How we write client stories

How to cite this page

La Rose, J. (2026). Who Is Most Likely to Get OCD?. The OCD Clinic. https://theocdclinic.ca/ocd-faq/who-is-most-likely-to-get-ocd