New Seattle was a city on Penthara IV.
When the planet experienced a dust cloud after an asteroid impact in 2368, New Seattle reported a cloud depth of twelve kilometers and two tropical rivers starting to freeze. (TNG: "A Matter Of Time")
According to Beckett Mariner, New Seattle was the location of a "hump dungeon". (LD: "Something Borrowed, Something Green")
This city was only mentioned in dialogue.