| Ralf Keidel | |
| Height: | 1.80 m |
| Birth Date: | 6 March 1977 |
| Birth Place: | Würzburg, West Germany |
| Position: | Midfielder |
| Currentclub: | FC Ingolstadt 04 II (assistant) |
| Youthclubs1: | ASV Rimpar |
| Youthclubs2: | Kickers Würzburg |
| Years1: | 1996–1997 |
| Clubs1: | 1. FC Schweinfurt 05 |
| Years2: | 1997–1999 |
| Clubs2: | Newcastle United |
| Caps2: | 0 |
| Goals2: | 0 |
| Years3: | 1999–2004 |
| Clubs3: | MSV Duisburg |
| Caps3: | 109 |
| Goals3: | 6 |
| Years4: | 2004–2005 |
| Clubs4: | Rot-Weiß Oberhausen |
| Caps4: | 30 |
| Goals4: | 1 |
| Years5: | 2005–2006 |
| Clubs5: | LR Ahlen |
| Caps5: | 30 |
| Goals5: | 0 |
| Years6: | 2006–2011 |
| Clubs6: | FC Ingolstadt 04 |
| Caps6: | 111 |
| Goals6: | 4 |
| Years7: | 2011–2013 |
| Clubs7: | FC Ingolstadt 04 II |
| Caps7: | 47 |
| Goals7: | 1 |
| Nationalyears1: | 1997–1999 |
| Nationalteam1: | Germany U-21 |
| Nationalcaps1: | 5 |
| Nationalgoals1: | 0 |
| Nationalyears2: | 1998 |
| Nationalteam2: | Germany Olympic |
| Nationalcaps2: | 4 |
| Nationalgoals2: | 0 |
| Manageryears1: | 2013– |
| Managerclubs1: | FC Ingolstadt 04 II (assistant)[1] |
Ralf Keidel (born 6 March 1977) is a German football coach and former player.[2] He works as assistant manager for FC Ingolstadt 04 II.
Keidel made his debut on the German professional league level in the Bundesliga for MSV Duisburg on 31 March 2000 when he came on as a substitute in the 88th minute in a game against SSV Ulm 1846.