Oelwein, Iowa
（重定向自Oelwein）
![](/Images/godic/202501/30/Fayette_County_Iowa_Incorporated_and_Unincorporated_areas_Oelwein_Highlighted.svg0658.png")
![CGW locomotive shop in the early 1900s](/Images/godic/202501/30/Chicago_Great_Western_Shop_Oelwein_Iowa0658.JPG")
Oelwein is a city in Fayette County, Iowa, United States. The population was 6,415 at the 2010 census, a decrease of 4.1% from the 2000 census. The largest community in Fayette County, it is located at the junction of State Highways 3 and 150.