Hospitals in McHenry County, IL
3 hospitals, 3 with emergency services. Critical Access Hospital: 1 · Acute Care Hospital: 2.
Compare these hospitals side by side →
- Mercy Harvard Hospital(815) 943‑5431Critical Access Hospital · Harvard · ER · Full profile
- Mercyhealth Hospital & Physician Clinic-Crystal LA…(792) 220‑5500Acute Care Hospital · Crystal Lake · ER · Full profile
- Northwestern Medicine McHenry(815) 344‑5000Acute Care Hospital · McHenry · ER · Medicare rating 5 of 5 · Full profile
Cities in McHenry County with hospitals
Nursing homes, hospice, home health and dialysis
Medicare-certified providers, with Medicare star ratings and official data.
Outpatient surgery centers
Medicare-certified ambulatory surgery centers: kinds of surgery, Medicare quality measures and patient survey.
Medical supply stores
Medical equipment suppliers enrolled in Medicare: wheelchairs, walkers, oxygen, CPAP, diabetic supplies and more.
ER wait times and Medicare ratings
Ranked only by official Medicare (CMS) numbers.
Care in McHenry County: specialties, conditions and doctors
Specialties listed by hospitals here
Conditions listed by hospitals here
The number is how many hospitals here list it on their own website (hospitals with a reviewed website profile only).
Health centers, clinics and pharmacies in McHenry County
Addiction and mental health treatment in McHenry County
From SAMHSA’s FindTreatment.gov. In a crisis, call or text 988.
Common questions
How many hospitals are in McHenry County, Illinois?
Our directory lists 3 hospitals in McHenry County: Mercy Harvard Hospital, Mercyhealth Hospital & Physician Clinic-Crystal LA… and Northwestern Medicine McHenry.
Which hospitals in McHenry County have an emergency room?
According to Medicare (CMS) data: Mercy Harvard Hospital, Mercyhealth Hospital & Physician Clinic-Crystal LA… and Northwestern Medicine McHenry. In a medical emergency, call 911.
What are the Medicare star ratings of hospitals in McHenry County?
In the current CMS overall rating (1 to 5 stars): Northwestern Medicine McHenry, 5 stars. Other hospitals here are not rated by CMS.
Source: Centers for Medicare & Medicaid Services (CMS), data updated 2026-07-22, retrieved 2026-10-29. Basic profiles: services not yet reviewed in detail.