| Seddon Bagley | |
| Fullname: | Seddon Deaderick Bagley |
| Birth Date: | 31 December 1901 |
| Birth Place: | Burnie, Tasmania |
| Death Place: | Queenscliff, Victoria |
| Originalteam: | St Kilda Reserves / Prahran Juniors |
| Statsend: | 1926 |
| Years1: | 1925–26 |
| Games Goals1: | 5 (6) |
Seddon Deaderick Bagley (31 December 1901 – 5 September 1981) was an Australian rules footballer who played with Footscray in the Victorian Football League (VFL).[1]