| Morten Petersen | |
| Fullname: | Morten Roald Petersen |
| Birth Date: | 27 May 1978 |
| Birth Place: | Helsinge, Denmark |
| Height: | 1.85m (06.07feet) |
| Position: | Centre back |
| Years1: | 1997–2001 |
| Years2: | 2001–2002 |
| Years3: | 2002–2004 |
| Years4: | 2004–2011 |
| Clubs4: | Lyngby BK |
| Caps1: | 117 |
| Caps2: | 3 |
| Caps3: | 56 |
| Caps4: | 94 |
| Goals1: | 1 |
| Goals2: | 0 |
| Goals3: | 0 |
| Goals4: | 2 |
Morten Roald Petersen (born 27 May 1978) is a Danish retired football central defender who spent most of his career with Lyngby Boldklub. He has played several games for the Danish Under-21 and Under-19 national teams.
Petersen began his professional career in Lyngby in 1994, but left the club following its bankruptcy in December 2001. Since then he has played for Livingston F.C. and AGF, before returning to Lyngby, whom he has captained since the spring of 2005.