Since December I have been hunting down a lot of waterfalls. This is a quick sampling of the named ones with a few minor omissions (including some seasonal ones).
Hug Point Falls
Blumenthal Falls and Larsen Creek Falls
Panther Creek Falls and Sweeney Falls
Upper and Lower Rock Creek Falls
Kalama Falls and Rock Creek Falls
Slide Step Falls and Upper Marble Creek Falls
Lower Marble Creek Falls and Upper Rock Creek Falls
Outlet Falls and Gauntlet Falls
Wonder Falls and White River Falls
Lower White River Falls and Sherars Falls
Willamette Falls and Lucia Falls
Big Tree Creek Falls and Sunset Falls
Moulton Falls and Rattlesnake Falls
Lower Rattlesnake Falls and Husum Falls
Big Brother Falls and Sweeney Falls
Latourell Falls and Multnomah Falls
Horsetail Falls and Taitnapum Falls
Upper and Middle Lewis River Falls
Copper Creek Falls and Lower Copper Creek Falls
Lower Lewis River Falls
Fly Creek Falls and Mosier Creek Falls
Moulton Falls and Hidden Falls
Yacolt Falls and Umbrella Falls
Hug Point Falls and Youngs River Falls
Grist Mill Falls and Shady Creek Falls
There are still plenty to find. Happy Hunting.