- Crystal and Bradley Williams (owners), Rocky Williams (dog)
- 13.883 centimetre(s)
- United States (Bloomington)
The longest tongue on a living dog is 13.88 cm (5.46 in), and belongs to Rocky, as verified in Bloomington, Illinois, USA, on 15 June 2023.
Rocky is a male boxer and is currently a healthy 9-year-old dog, weighing 27.44 kg (60.5 lbs).