Adelphia
- Adelfia
- Adelphi (disambiguation)
- Adelphia (moth)
- Adelphia (plant)
- Adelphia (roman noble)
- Adelphia College
- Adelphia Communications Corporation
- Adelphia Plantation
- Adelphia, New Jersey
- Edgecombe County, North Carolina
- Howell Township Public Schools
- Nissan Stadium (Nashville)
- Philadelphia
- Sarcophagus of Adelphia
- Siracusa, Sicily
- Stolen Diamonds