Winnebago Mental Health Institute
WMHI admissions now at Gordon Hall
Effective March 31, 2026, WMHI admissions are accepted at Gordon Hall until further notice due to a long-term construction project. When arriving on campus, follow signs for Gordon Hall. Admissions contact information will remain the same.
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.
Improving systems for people with intellectual and developmental disabilities and mental health needs
Wisconsin is working on 37 recommendations for improving systems and services for people who have intellectual and developmental disabilities and mental health needs.
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.