Ethelbert or Æthelberht is a masculine given name.
Ethelbert may also refer to:
- Ethelbert, Manitoba, Canada, a village
- Municipality of Ethelbert, Manitoba
- Rural Municipality of Ethelbert, Manitoba, a former municipality
- Ethelbert (electoral district), Manitoba, a former provincial electoral district
- Ethelbert Ridge, Alexander Island, Antarctica
- Mount Ethelbert, a mountain in British Columbia