| Honorific-Prefix: | The Honourable |
| Henry Roger Justin Lewis | |
| Order: | 20th |
| Office: | Attorney General of Fiji |
| Governor: | Sir Kenneth Maddocks Sir Derek Jakeway Sir Robert Sidney Foster |
| 1Blankname: | Chief Minister |
| 1Namedata1: | Ratu Sir Kamisese Mara (from 20 September 1967) |
| Term Start: | 1963 |
| Term End: | 1970 |
| Predecessor: | Ashley Greenwood |
| Successor: | John Falvey |
| Order1: | 6th |
| Office1: | Solicitor General of Fiji |
| Monarch1: | Elizabeth II |
| Governor1: | Sir Ronald Garvey Sir Kenneth Maddocks |
| Term Start1: | 1956 |
| Term End1: | 1963 |
| Predecessor1: | Ashley Greenwood |
| Successor1: | Donal McLoughlin |
| Birth Date: | 1925 12, df=y[1] |
| Birth Place: | Staffordshire, England[2] |
Henry Roger Justin Lewis (born 6 December 1925) was a British lawyer who served as Solicitor General of Fiji from 1956 to 1963,[3] and as Attorney General of Fiji from 1963 to 1970.[4]
Lewis participated in the Marlborough House conference chaired by Eirene White in July 1965, to discuss constitutional reforms. The Fijian delegation consisted of six ethnic Fijians (Ratu Sir George Cakobau, Ratu Sir Edward Cakobau, Ratu Sir Penaia Ganilau, Ratu Sir Kamisese Mara, Josua Rabukawaqa, and Semesa Sikivou), six Indo-Fijians (Dr. A. D. Patel, Sidiq Koya, James Madhavan, C. A. Shah, Andrew Deoki, and C. P. Singh), and six Europeans (John Falvey, Ronald Kermode, John Moore, John Kearsley, Fred Archibald, and Cyril Aidney)[5] The Governor, Sir Derek Jakeway, and Lewis himself, as Attorney General, were designated separately. They were joined by a nine-member British delegation.[6]