1910 Census microfilms at Internet Archive

Reel 1278. Baker, Hood River, Benton, and Clatsop Counties.
Reel 1279. Clackamas, Columbia, and Crook Counties.
Reel 1280. Coos, Grant, Curry, Douglas, and Gilliam Counties.
Reel 1281. Harney, Josephine, Lincoln, and Jackson Counties.
Reel 1282. Klamath, Lake, Polk, and Lane (EDs 142-162, 304) Counties.
Reel 1283. Lane (EDs 163-165, 306, 309-312), Malheur, Tillamook, Linn, and Wheeler Counties.
Reel 1284. Marion, Morrow, and Wallowa Counties.
Reel 1285. Multnomah (EDs 124-142, 169-173, 319) County.
Reel 1286. Multnomah (EDs 143-168, 188-198) County.
Reel 1287. Multnomah (EDs 199-210, 227-242, 243(pt.), 246, 321, 327) County.
Reel 1288. Multnomah (EDs 110-123, 174-187, 243(pt.), 244-245, 320, 329) County.
Reel 1289. Multnomah (EDs 211-226), Sherman, and Umatilla Counties.
Reel 1290. Union, Wasco, and Yamhill (EDs 283-287, 289-297, 299) Counties.
Reel 1291. Yamhill (EDs 288, 298, 300, 301, 305) and Washington Counties.