Sure, Berk had vikings so that's obviously Minnesota, but as of 2019, the Light Fury told Toothless that Hiccup's kids don't like dragons. 2 years later, the Mariners had signed them and just like that, they took their offspring to Seattle. Here, a picture of the couple in front of the city skyline at night.

Toothless & the Light Fury © How To Train Your Dragon, Dreamworks