Dirk Dier
| Country (sports) | Germany | 
|---|---|
| Residence | Blieskastel, Germany | 
| Born | 16 February 1972 Sankt Ingbert, West Germany  | 
| Height | 1.85 m (6 ft 1 in) | 
| Turned pro | 1990 | 
| Plays | Right-handed | 
| Prize money | $388,546 | 
| Singles | |
| Career record | 6–18 | 
| Career titles | 0  5 Challenger, 0 Futures  | 
| Highest ranking | No. 118 (22 April 1996) | 
| Grand Slam singles results | |
| Australian Open | Q2 (1989, 1999) | 
| French Open | 1R (1996) | 
| Wimbledon | 1R (1990) | 
| US Open | 2R (1996) | 
| Doubles | |
| Career record | 3–12 | 
| Career titles | 0  6 Challenger, 0 Futures  | 
| Highest ranking | No. 158 (17 April 2000) | 
| Grand Slam doubles results | |
| Wimbledon | Q1 (1990, 1993) | 
Dirk Dier (born 16 February 1972) is a former professional tennis player from Germany.