Harriman is a city located primarily in Roane County, Tennessee, with a small extension into Morgan County. The population of Harriman wa…Harriman is a city located primarily in Roane County, Tennessee, with a small extension into Morgan County. The population of Harriman was 5,892 at the time of the 2020 census. Harriman is situated along the physiographic boundary between the Tennessee Valley region and the Cumberland Plateau region, with the Plateau—namely its Walden Ridge escarpment—rising several hundred feet above the city to the west. The Emory River enters the Tennessee Valley just west of Harriman at a pass known as Emory Gap, and forms an oxbow bend that surrounds the original section of Harriman.
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