The 2011 Gerry Weber Open was a men's tennis tournament played on outdoor grass courts.

It was the 19th edition of the event known that year as the Gerry Weber Open and was part of the ATP World Tour 250 series of the 2011 ATP World Tour.

It took place at the Gerry Weber Stadion in Halle, Germany, between 6 June and 12 June 2011.

Unseeded Philipp Kohlschreiber won the singles title.

Rohan Bopanna / Aisam-ul-Haq Qureshi defeated Robin Haase / Milos Raonic, 7–6(10–8), 3–6, [11–9] The following players received wildcards into the singles main draw: The following players received entry from the qualifying draw: The following players received wildcards into the singles main draw: