| Bob Armstrong | |
| Fullname: | Robert Daniel Armstrong |
| Birth Date: | 25 July 1872 |
| Birth Place: | Melbourne |
| Death Place: | Prahran, Victoria[1] |
| Originalteam: | North Melbourne juniors |
| Height: | 170 cm |
| Weight: | 61 kg |
| Position: | Wing |
| Statsend: | 1898 |
| Years1: | 1897–98 |
| Games Goals1: | 12 (0) |
Robert Daniel Armstrong (25 July 1872 – 3 June 1951) was an Australian rules footballer who played with Carlton in the Victorian Football Association (VFA) and the Victorian Football League (VFL).