- Source: Ann Mercken
- Ann Mercken
- Anne
- Élodie Ouédraogo
- List of Belgian Athletics Championships winners
- Belgium at the 1996 Summer Olympics
- Athletics at the 1999 Summer Universiade – Women's 400 metres hurdles
- Athletics at the 1996 Summer Olympics – Women's 400 metres hurdles
- Athletics at the 2001 Summer Universiade – Women's 400 metres hurdles
- Belgium at the 2002 European Athletics Championships
- Golden Spike (Belgium)
Ann Mercken (born 6 May 1974 in Hasselt) is a retired Belgian athlete who specialised in the 400 metres hurdles. She represented her country at the 1996 Summer Olympics reaching the semifinals. She also competed at the 1999 World Championships.
Her personal best in the event is 54.95, set in 1996. This was the national record until Paulien Couckuyt improved it to 54.90 at the 2020 Summer Olympics.