The 2011 Berlin Marathon was the 38th edition of the annual marathon event and was held on Sunday 25 September on the streets of Berlin, Germany. The men's race was won by Patrick Makau of Kenya in a world record time of 2:03:38 hours. The women's winner was Florence Kiplagat, also from Kenya, won in a time of 2:19:44 hours, which made her the ninth fastest woman of all-time. It was the first marathon she had completed in her career. In total, 32,991 runners managed to finish the 2011 edition of the marathon, comprising 25,577 men and 7414 women.

The Berlin Marathon is a marathon event held annually on the streets of Berlin, Germany on the last weekend of September. Held annually since 1974, the event includes multiple races over the marathon distance of 42.195 kilometres (26.219 mi), including elite level road running competitions for men and women, a race for the public, an inline skating race, a wheelchair race, and a handcycle race.