The Game of Thrones wikia lists the 7 kingdoms as (define at the time of Aegon's conquest):
- Kingdom of the North, ruled by House Stark of Winterfell
- Kingdom of the Mountain and the Vale, ruled by House Arryn of the Eyrie
- Kingdom of the Isles and Rivers, ruled by House Hoare of castle Harrenhal. Formed when the Iron Islands conquered the Riverlands.
- Kingdom of the Rock, ruled by House Lannister of Casterly Rock
- Kingdom of the Stormlands, ruled by House Durrandon of Storm's End
- Kingdom of the Reach, ruled by House Gardener of Highgarden
So in present day, Tullys rule the Riverlands (since Aegon put the beats on Harren Hoare ), the Tyrell's rule the Reach (again thanks to Aegon) and Baratheons rule the Stormlands though I'm not sure....who occupies Storm's End now?
- Dorne, ruled by House Martell of Sunspear.
#StannisSet still rules Storm's End currently in the show...no one ever really talks about it