This article provides insufficient context for those unfamiliar with the subject. Please help improve the article by providing more context for the reader. (November 2015) (Learn how and when to remove this message)

Singles
2012 Marburg Open
Final
Champion	Jan Hájek
Runner-up	Andreas Haider-Maurer
Score	6–2, 6–2
Events
Singles Doubles
← 2011 · Marburg Open · 2013 →

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.

Björn Phau was the defending champion but chose to compete in Wimbledon instead.
Jan Hájek won the tournament by defeating Andreas Haider-Maurer 6–2, 6–2 in the final.

	Semifinals							Finals
		Marius Copil	3	6	3
	3	Jan Hájek	6	3	6
								3	Jan Hájek	6	6
								8	Andreas Haider-Maurer	2	2
	8	Andreas Haider-Maurer	7	6
		Javier Martí	5	4

	First round							Second round							Quarterfinals							Semifinals
	1	H Zeballos	6	4	6
	Q	Tim Puetz	3	6	0			1	H Zeballos	6	7
		H Heliövaara	3	1					P Červenák	2	5
		P Červenák	6	6											1	H Zeballos	64	77	1
		I Navarro	6	6												M Copil	77	62	6
		Hiroki Moriya	4	3					I Navarro	3	1
		M Copil	3	6	6				M Copil	6	6
	7	G Elias	6	3	1																		M Copil	3	6	3
	3	J Hájek	7	3	6																	3	J Hájek	6	3	6
	Q	U Ignatik	5	6	0			3	J Hájek	77	77
		D Lojda	6	4	5				V Crivoi	64	63
		V Crivoi	1	6	7										3	J Hájek	6	6
		P Sousa	4	2											5	T Gabashvili	4	4
	WC	K Krawietz	6	6				WC	K Krawietz	4	4
	Q	Markus Eriksson	2	5				5	T Gabashvili	6	6
	5	T Gabashvili	6	7

	First round							Second round							Quarterfinals							Semifinals
	8	A Haider-Maurer	66	6	6
		S Vagnozzi	78	4	2			8	A Haider-Maurer	6	6
		V Millot	4	1					R Albot	2	1
		R Albot	6	6											8	A Haider-Maurer	6	6
		M Lammer	77	6												S Greul	3	4
	WC	Constantin Christ	64	3					M Lammer	0r
		S Greul	6	7					S Greul	6
	4	A Bedene	4	5																		8	A Haider-Maurer	7	6
	6	J Silva	6	6																			J Martí	5	4
	WC	Robin Kern	2	3				6	J Silva	0	4
	WC	Julian Lenz	7	2r					J Martí	6	6
		J Martí	5	6												J Martí	3	6	6
		M Zverev	6	7												M Zverev	6	4	2
		D Gremelmayr	2	5					M Zverev	4	77	77
	Q	Nils Langer	2	4				2	D Gimeno-Traver	6	65	65
	2	D Gimeno-Traver	6	6

• Main Draw
• Qualifying Draw