Oatfield is an unincorporated community and census-designated place in Clackamas County, Oregon, United States.

[6] Oatfield is located in northwestern Clackamas County and is bordered by the city of Milwaukie to the northwest, unincorporated Oak Grove to the west, unincorporated Jennings Lodge to the southwest, and the city of Gladstone to the south.

Interstate 205 forms the eastern edge of the community, separating Oatfield from unincorporated Clackamas.

According to the United States Census Bureau, the Oatfield CDP has a total area of 3.4 square miles (8.8 km2), all land.

17.8% of all households were made up of individuals, and 7.1% had someone living alone who was 65 years of age or older.