| Theo Selemidis | |
| Birth Date: | 27 October 1959 |
| Birth Place: | Polyplatano, Florina, Greece [1] |
| Position: | Midfielder |
| Years1: | 1979–1987 |
| Clubs1: | Heidelberg United |
| Caps1: | 256 |
| Goals1: | 22 |
| Years2: | 1989 |
| Clubs2: | Melbourne Croatia |
| Caps2: | 22 |
| Goals2: | 1 |
| Nationalyears1: | 1980 |
| Nationalteam1: | Australia |
| Nationalcaps1: | 7 |
| Nationalgoals1: | 1 |
| Nationalyears2: | 1984 |
| Nationalteam2: | Australia B |
| Nationalcaps2: | 3 |
| Nationalgoals2: | 0 |
Theo Selemidis (born 27 October 1959) is an Australian former soccer player who played at both professional and international levels as a midfielder.
Selemidis played at club level for Heidelberg United and Melbourne Croatia.[2]
He also earned seven caps for Australia in 1980. Selemidis scored his only international goal in a 3–3 tie against Greece on 11 November 1980.[3]