Matthias Wegner, spokesman for the Steidl publishing house, confirmed that Grass died today morning in a Luebeck hospital.
Grass was lauded by Germans for helping to revive their culture in the aftermath of World War II and helping to give voice and support to democratic discourse in the postwar nation.
Yet he provoked the ire of many in 2006 when he revealed in his memoir "Skinning the Onion" that, as a teenager, he had served in the Waffen-SS, the combat arm of Adolf Hitler's notorious paramilitary organization.
A trained sculptor, Grass made his literary reputation with "The Tin Drum," published in 1959. It was followed by "Cat and Mouse" and "Dog Years," which made up what is called the Danzig Trilogy after the town of his birth, now the Polish city of Gdansk.
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The book follows the life of a young boy in Danzig who is caught up in the political whirlwind of the Nazi rise to power and, in response, decides not to grow up. His toy tin drum becomes a symbol of this refusal.
The books return again and again to Danzig, where Grass was born on October 16, 1927, the son of a grocer.
In the trilogy, Grass drew partly on his own experience of military service and his captivity as a prisoner of war held by the Americans until 1946.
Asked to reflect why the book became so popular, he noted that it tackles one of the most daunting periods of German history by focusing on the minutiae in the lives of ordinary people.
Then he quipped: "Perhaps because it's a good book."
Three decades after its release, in 1999, the Swedish Academy honored Grass with the Nobel Prize for literature, praising him for setting out to revive German literature after the Nazi era.