Red Harbor

Red Harbor is a harbor town on the Iron Islands. It serves as the main harbor for the region.

Season 2
Yara Greyjoy berths her fleet of thirty ships off Red Harbor because it is larger than Lordsport.

In the books
In the Song of Ice and Fire novels, Lordsport is a major port in its own right. There is no mention of Red Harbor although the harbors of most of the other Iron Islands have not been named.