Glenbrook is the name of several places:
- Ireland
- Glenbrook, County Cork, a small area in County Cork on the southeast tip of Ireland
- Canada
- Glenbrook, Calgary, a neighbourhood in Alberta
- United States
- Glenbrook, California
- Glenbrook, Lake County, California
- Glenbrook, Nevada County, California
- Glenbrook (Stamford), a section of Stamford, Connecticut
- Glenbrook, Nevada, the oldest settlement on Lake Tahoe
- Australia
- Glenbrook, New South Wales
- New Zealand
- Glenbrook, New Zealand