David William Barnes Blackwell
- Nationality: United Kingdom
- Rank: Private
- Regiment/Service: Royal Army Medical Corps.
- Unit: 21st. Casualty Clearing Hospital.
- Died: 11/2/1919
- Age: 26
- Service No: 4900
- Casualty Type: Commonwealth War Dead
- Grave/Memorial Reference: A.C.443 - NEWCASTLE-UPON-TYNE (ALL SAINTS) CEMETERY Northumberland, UK
Son of Mary Jane Schollar (formerly Blackwell) of 14, Edward Street, Newcastle on Tyne & late William George Blackwell