Elk River is a city in the northwestern United States in Clearwater County, Idaho. The population was 125 at the 2010 census, down from 156 in 2000. It is accessed from State Highway 8 from Bovill, to the west in adjacent Latah County. Formerly the site of a Potlatch sawmill, it was phased out after several decades during the 1930s. Geography Elk River is located at (46.782796, -116.180049), at an elevation of above sea level. According to the United States Census Bureau, the city has a total area of , all of it land. Climate This region experiences warm (but not hot) and dry summers, with no average monthly temperatures above . According to the Köppen Climate Classification system, Elk River has a dry-summer humid continental climate, abbreviated "Dsb" on climate maps. Demographics 2010 census As of the census of 2010, there were 125 people, 65 households, and 31 families residing in the city. The population density was . There were 152 housing units at an average density of . The racial makeup of the city was 100.0% White. Hispanic or Latino of any race were 3.2% of the population. There were 65 households, of which 9.2% had children under the age of 18 living with them, 46.2% were married couples living together, 1.5% had a female householder with no husband present, and 52.3% were non-families. 50.8% of all households were made up of individuals, and 20% had someone living alone who was 65 years of age or older. The average household size was 1.92 and the average family size was 2.90. The median age in the city was 52.4 years. 12.8% of residents were under the age of 18; 2.4% were between the ages of 18 and 24; 19.2% were from 25 to 44; 44% were from 45 to 64; and 21.6% were 65 years of age or older. The gender makeup of the city was 52.8% male and 47.2% female. 2000 census As of the 2000 census, there were 156 people, 75 households, and 54 families residing in the city. The population density was . There were 136 housing units at an average density of . The racial makeup of the city was 95.51% White, 0.64% Asian, and 3.85% from two or more races. Hispanic or Latino of any race were 0.64% of the population. There were 75 households, out of which 13.3% had children under the age