According to the Great Dane Club of America, in 2006, the oldest Great Dane was 15 years old. Unverified reports claim that there are Great Danes who have lived as long as 17 years.
Most Great Danes live an average of 7 to 10 years. A health survey by the Great Dane Club of America found the oldest living Great Dane to be 15 years of age at the time the survey was underway. Unfortunately, the most recent survey was conducted in 2006, and as of 2014, there has not been an updated survey with verified ages of Great Danes.