Donnelly is a city in rural Valley County, Idaho, United States. The population was 152 at the 2010 census. Donnelly is in the Long Valley of Valley County, on the northeast shore of Lake Cascade (Cascade Reservoir), between the two major cities in the county. McCall is north, and Cascade is to the south, via Highway 55. Tamarack Resort is across the reservoir to the southwest. The City of Donnelly, named after a prominent railroad man, was incorporated in 1914. Donnelly is the world headquarters of the celebrated Donnelly Show Ski Team which was established in 2008. Geography Donnelly is located at , 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. Donnelly is the gateway community for Tamarack Resort, which in 2014 emerged from foreclosure and restarted recreation activities. Demographics 2010 census As of the census of 2010, there were 152 people, 60 households, and 37 families residing in the city. The population density was . There were 100 housing units at an average density of . The racial makeup of the city was 94.7% White, 0.7% African American, 1.3% Native American, 1.3% from other races, and 2.0% from two or more races. Hispanic or Latino of any race were 3.3% of the population. There were 60 households, of which 41.7% had children under the age of 18 living with them, 43.3% were married couples living together, 13.3% had a female householder with no husband present, 5.0% had a male householder with no wife present, and 38.3% were non-families. 35.0% of all households were made up of individuals, and 10% had someone living alone who was 65 years of age or older. The average household size was 2.53 and the average family size was 3.22. The median age in the city was 32.5 years. 30.9% of residents were under the age of 18; 8.5% were between the ages of 18 and 24; 29% were from 25 to 44; 23% were from 45 to 64; and 8.6% were 65 years of age or older. The gender makeup of the city was 51.3% male and 48.7% female. 2000 census As of the census of 2000, there were 138 people, 55 households, and 32 families residing in the city. The population density was . There were 72 housing units at an average density of .