1 emergency department · ON · Updated every 15 minutes
London · 34 km away
London · 33 km away
London · 29 km away
Strathroy · 51 km away
Clinton · 51 km away
St. Marys has 1 emergency department — 1 open 24 hours a day, 7 days a week.
Wait time data for St. Marys is sourced from individual hospital websites and updates as frequently as every 15–30 minutes. ERstat displays the estimated time from triage registration to being seen by a physician.
All emergency departments in St. Marys use the Canadian Triage and Acuity Scale (CTAS) to prioritize patients. Patients with more serious conditions are always seen first, regardless of arrival time or displayed wait. A shorter posted wait does not guarantee a shorter visit — it depends on the severity of your condition relative to other patients in the department.
Check wait times on this page before leaving. ERstat updates every 5 minutes and shows all St. Marys ERs sorted from shortest to longest wait. Each hospital page includes a 12-hour forecast chart and a “Best Time to Visit” pattern based on historical data.
If your condition is not life-threatening, consider whether a walk-in clinic, urgent care centre, or pharmacist could help instead. Ontario pharmacists can assess and prescribe for many common conditions with no appointment needed. See what your pharmacist can treat →
Not sure if you need the ER? Call 811 to speak with a registered nurse. Free, confidential, available 24/7.
If you are experiencing a medical emergency — chest pain, difficulty breathing, stroke symptoms, severe bleeding, or loss of consciousness — call 911 immediately.
Work at an ER? Report your wait times — free, takes 30 seconds.
Hospital administrator? Manage your ER listing on ERstat.