The 2012 Berlin Marathon was the 39th edition of the annual marathon event and was held on Sunday 30 September on the streets of Berlin, Germany. An IAAF Gold Label Road Race, it was the third World Marathon Majors event to be held that year. Geoffrey Mutai won the men's race in a time of 2:04:15 hours and Aberu Kebede was the women's winner in 2:20:30. A total of 34,377 people finished the marathon race.

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.