Finding Zoro's address in Wano is like trying to track down a leaf in a hurricane—this guy has zero sense of direction! If you're serious about it, though, your best bet is to follow the trail of destroyed buildings and unconscious bounty hunters. During the Wano arc, he bounces between places like the Flower Capital (where he trained with Yasuie), the ruins of the Ringo region, and Onigashima during the raid. But honestly? He’ll probably get lost on the way to his own doorstep.
If you really want to pin him down, keep an ear out for local gossip. The citizens of Wano love to chatter, especially about 'that green-haired swordsman who keeps wandering into wrong tea houses.' Or just look for Sanji—those two argue so loudly, you can probably hear them from three towns over.