Dawson has put pen to paper on a two year deal at the City Ground, and he will add some much-needed experience to their defensive line.
The centre-back earned four England caps during his time at Tottenham, where he played 91 times, before moving to Hull in 2014.
This season, he made 40 appearances, scoring three times in the Championship as Hull finished 18th.
The deal will go through on July 1st, when his contract at Hull ends, meaning there is no fee involved.