| John Roberson Diamond | |
| Birth Date: | May 14, 1820 |
| Death Date: | January 9, 1880 (aged 59) |
| Birth Place: | DeKalb County, Georgia, US |
| Death Place: | Grayson County, Texas, US |
| Allegiance: | Confederate States |
| Branch: | Confederate States Army |
| Branch Label: | Branch |
| Rank: | Lieutenant colonel |
| Battles: | |
| Battles Label: | Battles |
John Roberson Diamond (May 14, 1820 – January 9, 1880) was a Confederate cavalry officer, rising to become lieutenant colonel in James G. Bourland's "Border Regiment", which was tasked with protecting the northern border of Texas during the American Civil War.[1] He was also an active Freemason and Odd Fellow in Grayson County, Texas.