| Age | 56 (age at death) |
| Birthday | 8 June, 1854 |
| Birthplace | Whittingehame House, East Lothian, Scotland |
| Died | 14 February, 1911 |
| Zodiac Sign | Gemini |
| Nationality | Scottish |
| Occupation | Architect |
Colonel Eustace James Anthony Balfour (8 June 1854 – 14 February 1911) was a London-based Scottish architect. The brother of one British Prime Minister and nephew of another, his career was built on family connections. His mother was the daughter of a Marquess, and his wife Frances, a noted suffragist, was the daughter of a Duke. Frances's sister in-law was Princess Louise, daughter of the reigning Queen Victoria.
