Multnomah County, Portland Oregon. No idea which total is accurate so I'm going with the higher. New material is added every Tuesday.
Audiobook: (The new #15)
15584 -- New Additions
12922 -- Fiction 9900, Non 3022
Ebook: (doesn't make the cut)
38266 -- New Additions
30739 -- Fiction 21796, Non 8943
This is one of several counties that make the urban area.
Edit: They also have 3M which I did not include and looks impossible to count.