| Ademar Marques | |
| Fullname: | Ademar Moreira Marques |
| Birth Date: | 4 March 1959 |
| Birth Place: | Lisbon, Portugal |
| Position: | Midfielder |
| Years1: | 1977–1983 |
| Years2: | 1983–1984 |
| Years3: | 1984–1985 |
| Years4: | 1985–1986 |
| Years5: | 1986–1987 |
| Years6: | 1987–1993 |
| Clubs6: | Farense |
| Caps1: | 97 |
| Goals1: | 9 |
| Caps3: | 5 |
| Goals3: | 0 |
| Caps4: | 14 |
| Goals4: | 1 |
| Nationalteam1: | Portugal |
| Nationalcaps1: | 2 |
| Nationalgoals1: | 0 |
Ademar Moreira Marques (born 4 March 1959 in Lisbon) is a former Portuguese footballer who played as a midfielder.
His son Renato Marques is a professional footballer.