The 2012 Marburg Open was a professional tennis tournament played on hard courts. It was the third edition of the tournament which was part of the 2012 ATP Challenger Tour. It took place in Marburg, Germany between 25 June and 1 July 2012.
ATP entrants
Seeds
| Country | Player | Rank1 | Seed |
|---|---|---|---|
 ARG
|
Horacio Zeballos | 98 | 1 |
 ESP
|
Daniel Gimeno Traver | 102 | 2 |
 CZE
|
Jan Hájek | 103 | 3 |
 SLO
|
Aljaž Bedene | 111 | 4 |
 RUS
|
Teymuraz Gabashvili | 147 | 5 |
 BRA
|
Júlio Silva | 157 | 6 |
 POR
|
Gastão Elias | 161 | 7 |
 AUT
|
Andreas Haider-Maurer | 163 | 8 |
- 1 Rankings are as of June 18, 2012.
Other entrants
The following players received wildcards into the singles main draw:
Constantin Christ- Robin Kern
- Kevin Krawietz
- Julian Lenz
The following players received entry from the qualifying draw:
Markus Eriksson
Uladzimir Ignatik- Nils Langer
- Tim Puetz
Champions
Singles
- Jan Hájek def. Andreas Haider-Maurer, 6–2, 6–2
Doubles
Mateusz Kowalczyk / David Škoch def. Denis Matsukevich / Mischa Zverev, 6–2, 6–1