| Didier Ernst | |
| Birth Date: | 15 September 1971 |
| Birth Place: | Dison, Belgium |
| Height: | 1.76 m |
| Position: | Defender |
| Years1: | 1991–2002 |
| Caps1: | 238 |
| Goals1: | 5 |
| Years2: | 1993 |
| Clubs2: | →FC Boom (on loan) |
| Caps2: | 2 |
| Goals2: | 0 |
| Years3: | 2002–2003 |
| Caps3: | 29 |
| Goals3: | 1 |
| Years4: | 2003–2004 |
| Caps4: | 32 |
| Goals4: | 2 |
| Years5: | 2004–2005 |
| Caps5: | 30 |
| Goals5: | 4 |
| Years6: | 2005–2007 |
| Caps6: | 50 |
| Goals6: | 1 |
| Years7: | 2007–2008 |
| Clubs7: | Comblain Sport |
| Caps7: | 3 |
| Goals7: | 0 |
| Years8: | 2008–2009 |
| Clubs8: | Spa FC |
| Caps8: | 0 |
| Goals8: | 0 |
| Totalcaps: | 384 |
| Totalgoals: | 11 |
| Nationalyears1: | 1999 |
| Nationalcaps1: | 1 |
| Nationalgoals1: | 0 |
| Manageryears1: | 2010–2011 |
| Managerclubs1: | Verviers |
| Manageryears2: | 2011–2012 |
| Managerclubs2: | Calamine |
| Manageryears3: | 2012– |
| Managerclubs3: | Comblain |
Didier Ernst (born 15 September 1971) is a Belgian former footballer who played as a defender.
While at La Louvière he helped them win the 2002–03 Belgian Cup.[1]