As the Wiki specifies (my apologies; I'm too lazy to look up specific manga chapters page by page):
Shiganshina District was the first city to fall when Wall Maria was
breached, leading to a massive slaughter and prompting humanity to
abandon the entire perimeter and the remaining cities along the Wall
as they attempted to consolidate their losses. After the fall of Wall
Maria, humanity was pushed into Wall Rose.
So yes, they are empty. Probably not as damaged as Shiganshina but considering most of the loss in human lives was due the insufficiency of evacuation vacancies, it's fair to say, people might have met a slower and more prolongued, but equally bloody, end as those in Shiganshina.