Glenns Ferry is a city in Elmore County, Idaho, United States. The population was 1,319 at the 2010 census. The city is adjacent to Interstate 84 and the Snake River. History Glenns Ferry was one of the most famous and treacherous river crossings on the Oregon Trail. Pioneers forded the Snake River at the Three Island Crossing until 1869, when Gustavus "Gus" Glenn constructed a ferry about two miles upstream, primarily to expedite freight but also for emigrants. His boat, which could hold two wagons, cut nearly twenty miles from the former route. In 1871 the city of Glenns Ferry was established. Construction of the Oregon Short Line Railroad through the town in 1883 gave the city its first major employer. Opened in 1971, Three Island Crossing State Park is home to The Oregon Trail History and Education Center, where visitors can learn about pioneer emigrants and Native American history. The Glenns Ferry community sponsors a crossing commemoration the second Saturday of each August. The Glenns Ferry townsite was platted in 1871, just downstream from the ferry site. It is one of just two incorporated cities in Elmore County, along with Mountain Home. Geography Glenns Ferry is located at (42.951954, -115.301132), at an elevation of above sea level. According to the United States Census Bureau, the city has a total area of , of which, is land and is water. Demographics 2010 census As of the census of 2010, there were 1,319 people, 559 households, and 350 families residing in the city. The population density was . There were 684 housing units at an average density of . The racial makeup of the city was 82.2% White, 0.2% African American, 2.0% Native American, 0.4% Asian, 11.8% from other races, and 3.4% from two or more races. Hispanic or Latino of any race were 24.6% of the population. There were 559 households, of which 27.9% had children under the age of 18 living with them, 48.5% were married couples living together, 10.4% had a female householder with no husband present, 3.8% had a male householder with no wife present, and 37.4% were non-families. 32.6% of all households were made up of individuals, and 18.1% had someone living alone who was 65 years of age or older. The average household size was 2.36 and the average family size was 3.00. The median age in the city was 42.6 years. 25.6% of residents