Palmer Creek is a tributary of the Yamhill River in northwestern Oregon in the United States.

It continues generally north, entering the larger stream at Dayton, 5 miles (8 km) upstream of the Yamhill's confluence with the Willamette River.

[4][5] It flows through private agricultural lands and is highly denuded by residual pesticides.

[7] Coastal cutthroat trout move into Palmer Creek from the Yamhill River during the autumn and winter, and a small number of them remain through summertime.

Other fish that inhabit the Yamhill River and the lower section of Palmer Creek are carp, goldfish, largescale sucker, chiselmouth, redside shiner, peamouth chub, northern squawfish, sculpin, dace and Pacific lamprey.