| Arnaldo de Novais Guedes Rebelo | |
| Birth Date: | 11 June 1847 |
| Birth Place: | Vitória, Porto, Portugal |
| Death Date: | 1917 |
| Death Place: | Portugal |
| Nationality: | Portuguese |
| Office: | Colonial governor of Cape Verde |
| Term Start: | June 1900 |
| Term End: | 1 October 1902 |
| Predecessor: | João Cesário de Lacerda |
| Successor: | Francisco de Paula Cid |
| Office2: | Colonial governor of Macau |
| Term Start2: | 17 December 1902 |
| Term End2: | 10 December 1903 |
| Predecessor2: | José Maria de Sousa Horta e Costa |
| Successor2: | Council of Government |
| Office3: | Colonial governor of Portuguese India |
| Term Start3: | 8 November 1905 |
| Term End3: | 14 February 1907 |
| Predecessor3: | Eduardo Augusto Rodrigues Galhardo |
| Successor3: | José Maria de Sousa Horta e Costa |
Arnaldo Nogueira de Novais Guedes Rebelo (11 June 1847 – 1917) was a Portuguese colonial administrator and military officer. He was born on 11 June 1847 in Vitória, a parish of Porto.[1]
He was governor of Cape Verde between June 1900 and 1 October 1902,[2] governor of Macau between 17 December 1902 and December 1903[3] and governor of Portuguese India from 8 November 1905 until 14 February 1907.[4] He was appointed brigadier general in 1910.[1]