Do the counties really matter where you don't know what the population is in each one?
Multnomah (Portland) 188441 83677 21048 295574 64% 28%
Lincoln 10861 8446 1435 20926 52% 40%
Lane (Eugene) 78583 61578 10245 151266 52% 41%
Benton (Corvallis) 19444 15825 2463 38049 51% 42% Clatsop 8296 6950 939 16388 51% 42%
Columbia (St Helens) 10331 9369 970 21061 49% 44%
Hood River 4072 3721 645 8527 48% 44% Washington (W. Portand) 90662 86091 6985 185508 49% 46%
Tillamook 5762 5775 613 12302 47% 47%
Clackamas (SE Portand?) 76421 77359 6357 161661 47% 48%
Marion (Salem) 49430 57443 4679 112786 44% 51%