Winnebago Mental Health Institute

Over 150 years of caring for Wisconsin

Since 1873, Winnebago Mental Health Institute (WMHI) has been a key behavioral health service provider in Wisconsin. WMHI is accredited by The Joint Commission.

What we do

WMHI staff help people of all ages living with challenging behaviors and complex psychiatric conditions. The goal is to help patients get better, recover, and return home to live a healthy life. All patients come from county health and human services agencies and the court system.

Learn more about WMHI patients and services.

Our staff

WMHI wouldn’t be what it is today without its caring team. Our diverse staff works hard to make sure patients get what they need for treatment.

People love working at WMHI to make a difference. As state employees, they also get great benefits.

Learn more about the career opportunities at WMHI.

Wisconsin IDD-MH System Improvement

The Wisconsin Intellectual and Developmental Disabilities and Mental Health (IDD-MH) System Improvement Report (PDF) came out in June 2024. It gives 37 specific recommendations for improving systems and services for people with IDD-MH needs in Wisconsin. Visit the Wisconsin IDD-MH System Improvement page for more information.

Where to find us

Visiting

4100 Treffert Drive
Oshkosh, WI 54901

Use the Treffert Drive address to drive to WMHI. WMHI is on Oshkosh’s north side. View driving directions to WMHI.

Mailing

Winnebago Mental Health Institute
PO Box 9
Winnebago, WI 54985

Use the PO Box address to send mail to WMHI. View additional contact information for WMHI.