Although it is unincorporated , it has a post office , with the ZIP code of 45688 .
Waterloo is an unincorporated community in southeastern Symmes Township , Lawrence County , Ohio , United States , along Symmes Creek .
Although it is unincorporated , Waterloo has a post office , with the ZIP code of 45688 .
Waterloo is an unincorporated community in southeastern Symmes Township , Lawrence County , Ohio , United States , along Symmes Creek .