Barlow is a city in Clackamas County, Oregon, United States. The population was 133 at the 2020 census. The mayor of Barlow is Robert Lang Larson. Barlow is named for William Barlow, the son of Samuel K. Barlow. Samuel bought the donation land claim in which Barlow is located from Thomas McKay on September 17, 1850. He later sold the land to William.