Dundee is a city in Yamhill County, Oregon, United States. The population was 3,238 at the 2020 census. Dundee was named after Dundee, Sc…Dundee is a city in Yamhill County, Oregon, United States. The population was 3,238 at the 2020 census. Dundee was named after Dundee, Scotland, the birthplace of William Reid. Reid came to Oregon in 1874 to establish the Oregonian Railway, and made several extensions to the railroad in the western Willamette Valley.