Oettinger married Inken Stange in 1994, by whom he has one son.
On 9 December 2007, Oettinger and Inken announced that they were separated.
Three days later, Oettinger's wife was reported to have already been in a relationship for nine months with Otmar Westerfellhaus, Managing Director of the Porsche car-manufacturing subsidiary in Mannheim.

After separating from his wife, Oettinger's liaison with Friederike Beyer, a PR events organiser from Hamburg, who is 25 years his junior, enjoyed wide coverage in the German press.
Since 2010, the couple has been residing in Brussels.
Oettinger married Inken Stange in 1994, by whom he has one son. On 9 December 2007, Oettinger and Inken announced that they were separated. Three days later, Oettinger's wife was reported to have already been in a relationship for nine months with Otmar Westerfellhaus, Managing Director of the Porsche car-manufacturing subsidiary in Mannheim.
After separating from his wife, Oettinger's liaison with Friederike Beyer, a PR events organiser from Hamburg, who is 25 years his junior, enjoyed wide coverage in the German press. Since 2010, the couple has been residing in Brussels.
Günther Oettinger