Eustace is a given and family name.
Eustace may also refer to:
- Eustace, Texas, USA
- Eustace (narrowboat), a boat in the West Country Living Museum, England
- Bishop Eustace Preparatory School, New Jersey
- Eustace Hall, a campus building at Michigan State University
- Eustace, a main character in the animated series Courage the Cowardly Dog